Below is a list of over 40 of the most common Latin prefixes which appear in English words.
ab-: This is a very important Latin prefix that conveys several possible contextual meanings of “from” or “away from,” indicating motion and distance away or origin from. Examples containing this prefix in English include abnormal, absent, and abstract.
ad-: This is a common Latin prefix that can mean a direction “towards,” of time “until” or presence “at” a location. Due to a process called assimilation, the final '-d' often changes to match the first letter of the root word (e.g., ac-knowledge, af-fix, as-sociate). Examples of English words with this prefix include adapt, admit, and adopt.
ambi-: This prefix means “both” or “on both sides.” It originates from the Latin numeral ambo (“both”) and a related root meaning "around." The Latin verb ambio ("to go around") is a compound formed from this prefix, not the other way around. A great example in the English language of this prefix is the word ambidextrous, referring to “dexterity in both hands” and ambiguous (in Latin ambiguus), “something of a doubtful nature” (something that “goes around” in an indirect way).
The Latin adjective ambitiosus, which referred to someone who was “eager for political office” was a derivation of the term ambitus which was an adjective used for canvassing politicians because they would “go around” from place to place delivering speeches and bribes. In this “round-about” way, no pun intended, we now have the English word ambitious!
ante-: This is a common Latin prefix that means “prior” or “before.” It often carries a temporal sense (before in time), while prae- (English pre-) often has a spatial sense (in front of). However, this is not a strict rule, and there is overlap, as shown by the spatial example antechamber. Other examples include antecedent and anticipate.
aqua-: This is a prefix and word which means “water” which incidentally also became the name for alcohol or distilled spirits in the phrase aqua vitae (“the water of life”). The words aquarium and aquatic contain this Latin prefix.
avi-: This prefix comes from the Latin word avis, which means “bird” and confusingly can also refer to “omen,” because the Romans liked to perform their divination with birds. This prefix can have a more general meaning in English as it can also relate to the act of “flight” with examples like aviation and aviculture.
bi-: This prefix is derived from the Latin word “bis” meaning “twice” or “in two ways,” and was as popular and important in Latin as it is in English today, where it forms the prefix to words like bicycle, bimonthly, and bilingual.
centi-: This is a numeral prefix from the Latin word centum, meaning “one hundred”. In the metric system, it means “one-hundredth.” Examples include centimeter (one-hundredth of a meter) and centipede (“one hundred legs”).
circum-: This is a Latin prefix that means “around” or “surrounding.” From the same root is the Latin noun circus, which means “circle”, and gave the name to the large chariot racing stadium in ancient Rome, the Circus Maximus (“the greatest circle”), which is why we still talk about going to the circus today. Circumvent and circumference are examples of this Latin prefix finding its way into the English vocabulary.
co-: and its original form `con-` are very common Latin prefixes meaning “together”, “jointly” or “connected”. The '-n' in `con-` often assimilates with the following letter, creating forms like com- (before b, m, p), col- (before l), and cor- (before r). The highest elected office in the Roman Republic was the position of consul, which when translated literally means “co-ruler” or “he who rules together”. That makes a lot of sense as the number of consuls was always two, constraining the power of this ultimate office so as to avoid the return of monarchy. Many words formed with this prefix are found in the English language, some examples being coherent, cooperate, cognition, combine, collaborate, and correct.
contra-: This is a prefix that means “opposite” or “against”. In English, the meaning has sometimes morphed though the words look about the same, such as contradiction, in Latin contradicere, meaning “to speak against something”, and contrast, from the Vulgar Latin word contrastare, which means “to stand opposed to something”.
de-: This is a prefix which in Latin means “to remove” or “to take away from”. Obvious examples of English words formed with this prefix are decompose and depreciate. Less obvious is a word like debt, which comes from the Latin verb debeo (“to owe”), as a contraction of dehabeo (de and habeo), literally translated as “to have [something] from a person”.
deci-: This is a well-known Latin prefix from the numeral decem, which means “ten”. Examples of this prefix in the English language tend to be measurement units like decimeter, deciliter, and decibel or of course December (“the tenth month” of the Roman calendar, measured from March to December).
dis-: This is a Latin prefix that conveys a meaning of something being “separate”, “apart”, or “in different directions”. The Latin noun discrimen, meaning “that which divides” has a direct parallel in the English word discrimination. Many other examples of this prefix in the English language exist, such as disorder, disambiguation, and disconnect.
duo-: This is a Latin numeral and prefix that means “two”. Examples of English words that contain this prefix are duplex, duality, and duplicity.
ego-: This is a prefix that in English means “self”. It comes from the Latin personal pronoun ego, which means “I”. Some examples of English words formed with this prefix are egoism, egotistical, and egocentric.
equ-: This is a common English prefix, deriving from the Latin prefix aequ- which means “equal”, “even”, or expresses a sense of “uniformity”. Some examples of words in English formed using this prefix are equivalent, equilibrium, and equality.
ex-: in Latin is used both as a preposition and a prefix and means that something is “out of” or “from” something. Examples of English words formed with this prefix are exclude, expel, and explore. Interestingly, Latin has the direct equivalent verbs of excludo, expello, and exploro.
extra-: This is a Latin prefix that, in a literal spatial sense, can mean “outside,” and in a more abstract sense, refers to something “outside of” or “beyond” some boundary. The latter sense was inherited in English with examples such as extraordinary, extracurricular, extravagant, and extravert.
in-: This versatile prefix has two main meanings. It can mean “into” or “in” (inhabit, include), or it can mean “not,” acting as a negating prefix. When used for negation, the `-n-` often assimilates with the following consonant, leading to forms like il- (before 'l'), im- (before 'b', 'm', 'p'), and ir- (before 'r'). Examples of the negative form include inactive, illegal, impossible, and irrational.
infra-: This is a Latin adverb that means “below” or “underneath”, curiously resulting in the quite literal Latin name for the underworld, infernus “the lower world”, which only far later became related to the concept of fire (e. Inferno) due to the Christian conception of a fiery hell. English words formed with this prefix are for example infrastructure and infrared.
inter-: This is a useful Latin prefix and preposition that means “between” or “among”. It is used to form words in English such as international, interaction, and intermediate.
intro- (also intra-): This is a Latin prefix that means “inwards” or “within”. This commonly used prefix in English features examples such as introduction, introspection, and introvert.
ludo-: This is an interesting Latin prefix that means “relating to games or sports”. It comes from the Latin word ludus, originally meaning “game” and later also “school” because of the term being applied to the place where gladiators would train before the games, the ludii.
Not many examples exist in English using this prefix, though there are a few like ludicrous (something being “amusing as a game”, later “ridiculous”), ludology (“the study of games”), and the classic board game Ludo.
magni-: This is a prefix stemming from the Latin adjective magnus, meaning “large” or “great”. It became a popular cognomen throughout history, with figures like Pompeius Magnus (Pompey the Great) and Charlemagne (Charles the Great). In English, it means exactly the same thing and forms words like magnificent, magnify, and magnitude.
male-: This is a Latin prefix that means “bad” or “evil”, stemming from the Latin adjective malus. This prefix is used to form words in English such as malfunction, malicious, and malfeasance.
multi-: This is a well-known Latin prefix that means “more than one”. This prefix is used to form words such as multipurpose, multinational, multimedia, and multilingual.
ob-: This is an interesting prefix which in Latin can mean “in front of” or “before”. In English, it often conveys a sense of something being “against” or "in the way of." The final '-b' can assimilate, creating forms like oc- and op-. Examples include obfuscate, obtuse, obstruct, occur, and oppose.
omni-: This prefix originates from the Latin word “omnis” meaning “all” or “each/every one of a whole”. It is used in the formation of numerous English words such as omniscient, omnipresent, and omnivore. Interestingly, the suffixes in those examples are all derived from Latin as well, -scio “to know”, -praesum “to be present” and -voro “to devour”.
per-: This is a prefix that can have several possible meanings, including “through” or “thoroughly”. Some examples of English words formed with this prefix are pervasive, perspective, and perforate.
pluvio-: This prefix comes from the Latin word pluvius which relates to “rain” or that which is “rainy”. This prefix can be found in English words such as pluviometer (a rain gauge) and the curious term pluviophile (someone who loves rain).
post-: This is an important Latin prefix that means “after” or “behind”. This prefix is used in the formation of numerous English words such as postponed, postgraduate, and postmodern.
pre-: This prefix derives from the Latin prefix prae- meaning “before” or “in front”. This prefix is used in the formation of English vocabulary words such as preconception, presume, and premature.
pro-: This is one of the Latin language’s most common prefixes and can have multiple meanings including “before”, “on behalf of”, or “in proportion to”. Some examples of English words formed with this prefix are pronoun, progress, and proactive.
re-: This prefix means “again” or the motion of going “back”. It is used in the formation of many words in the English vocabulary like rebuild, rewrite, and recycle.
recti-: This is a prefix used in English which means “straight”. It comes from the Latin word rectus, a participle of the verb rego “to lead”, meaning “leading” or “ruling” and can be understood by inference to mean leading forward/onwards/straight ahead. This prefix appears in words such as rectify and rectitude.
retro-: This is a Latin adverb and prefix meaning “backward” or “behind.” It indicates movement or direction backwards. It should not be confused with `re-`, which means "back" or "again." Examples in English include retrospect and retroactive.
se-: This prefix conveys a sense of “separation,” “cutting” or “apart.” Some examples of English words containing this prefix are security (in Latin securitas, literally “separation from/freedom from care”), and secede (in Latin secedo, “to go apart”).
semi-: This is a prefix which in Latin as well as English means “half” or “partial”. It is used in English words such as semifinal and semiconductor.
socio-: This is an essential prefix in English, coming from the Latin verb socio, which means “to unite/combine/associate.” Socii (a plural noun) was a common term the Romans used to refer to their allies, which is why the famously brutal war fought between the Romans and their own allies is known as the Social War (a.k.a. the War of the Allies). This prefix is used in many English words, such as sociology, socioeconomics, sociopath, and, of course, society.
sono-: This is an English prefix whose origin comes from the Latin noun, sonus, meaning “sound”. Sonority and sonogram are examples of English words containing this prefix.
sub-: This is a prefix analogous to the previously mentioned infra- and also means “below” or “under”. Its final consonant can assimilate (e.g., succeed, support). This prefix is used in the formation of many English words such as submarine, suboptimal, and subordinate.
super-: This is a very useful and common Latin prefix that means “over” or “above”. As with the prefix infra- the meaning was originally quite literal in a spatial sense. It also took the sense, however, of “superiority” (or “inferiority” with infra-) in a more abstract sense which remains in English to this day as well. Examples include supersonic, superficial, and superimposed.
trans-: This is a Latin prefix that means “across” or “on the other side of”. Its antonym, cis-, means “on this side of”. That gave rise to the Roman geographical titles over the lands to the south and north of the Alps, Cisalpine and Transalpine Gaul, literally “Gaul on our side and the other side of the Alps”. This Latin prefix appears in English words like translation, transmission, and transparency.
ultra-: This is a prefix which in Latin forms adverbs and adjectives like ultimum meaning “beyond,” “extremely,” “greatest” or “farthest.” In English, it retains the meaning, with some examples of words formed with this prefix being ultrasound, ultraviolet, and ultramarathon.
uni-: This prefix is derived from the Latin numeral word “unus” meaning “one”, this prefix can mean either “one” or “single”. This Latin word is part of the historical motto of the United States, E pluribus unum, “Out of many, one”, symbolizing the union of the thirteen colonies into one nation. Uniform and universal are just some of the many examples of words in the English vocabulary formed using this prefix.
Beyond Latin prefixesFor more prefixes that appear in English vocabulary words, see this list of Greek prefixes. One common point of confusion is the prefix arch- ("chief" or "principal," as in archetype or arch-rival). Although it entered English through Latin, its origin is the Greek word arkhe, so it is properly classified as a Greek prefix.
See here for a list of English vocabulary words which come from Latin.
Another interesting resource is this list of the 1000 most common Latin words.