Ad- | Meaning Of Prefix Ad- By Etymonline

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Origin and history of ad-

ad-

word-forming element expressing direction toward or in addition to, from Latin ad "to, toward" in space or time; "with regard to, in relation to," as a prefix, sometimes merely emphatic, from PIE root *ad- "to, near, at."

Simplified to a- before sc-, sp- and st-; modified to ac- before many consonants and then re-spelled af-, ag-, al-, etc., in conformity with the following consonant (as in affection, aggression). Also compare ap- (1).

In Old French, reduced to a- in all cases (an evolution already underway in Merovingian Latin), but French refashioned its written forms on the Latin model in 14c., and English did likewise 15c. in words it had picked up from Old French. In many cases pronunciation followed the shift.

Over-correction at the end of the Middle Ages in French and then English "restored" the -d- or a doubled consonant to some words that never had it (accursed, afford). The process went further in England than in France (where the vernacular sometimes resisted the pedantic), resulting in English adjourn, advance, address, advertisement (Modern French ajourner, avancer, adresser, avertissement). In modern word-formation sometimes ad- and ab- are regarded as opposites, but this was not in classical Latin.

Entries linking to ad-

accursed(adj.)

also accurst, early 13c., acursede "being under a curse," past-participle adjective from obsolete verb acursen "pronounce a curse upon, excommunicate" (late 12c.), from a- intensive prefix (see a- (1)) + cursein "to curse" (see curse (v.)). The unetymological -c- is 15c., a mistaken Latinism in imitation of words in acc-. The weakened sense of "worthy of a curse, damnable" is from 1590s. Related: Accursedly; accursedness.

address(v.)

early 14c., "to guide, aim, or direct," from Old French adrecier "go straight toward; straighten, set right; point, direct" (13c.), from Vulgar Latin *addirectiare "make straight" (source also of Spanish aderezar, Italian addirizzare), from ad "to" (see ad-) + *directiare "make straight," from Latin directus "straight, direct" past participle of dirigere "set straight," from dis- "apart" (see dis-) + regere "to direct, to guide, keep straight" (from PIE root *reg- "move in a straight line"). Compare dress (v.)).

The oldest sense in English is preserved in the terminology of golf (to address a ball). The meaning "direct for transmission, write as a destination on a message" is from mid-15c. The meaning "direct spoken words (to someone)" is from late 15c. From late 14c. as "to set in order, repair, correct." The attempt to (falsely) re-Latinize the spelling to add- began in France 15c. but failed there (the Modern French verb is adresser); it stuck in English. Related: Addressed; addressing.

• adjourn
• advance
• advertisement
• affection
• afford
• aggression
• a cappella
• a deux
• a la
• abandon
• abase
• abate
• abbreviate
• abbreviation
• Aberdeen
• abet
• abeyance
• abridge
• See All Related Words (308)

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adjournmid-14c., ajournen, "assign a day, fix a day" (for convening or reconvening of an organized body), from Old French ajorner (12c.) "meet" (at an appointed time), from the phrase à jorn "to another day, to a (stated) day," from à "to" (see ad-) + journ "day," from Latin diurnus "daadvancemid-13c., avauncen (transitive), "improve (something), further the development of," from Old French avancir, avancier "move forward, go forward, set forward" (12c., Modern French avancer), from Vulgar Latin *abanteare (source of Italian avanzare, Spanish avanzar). This is from Laadvertisementearly 15c., "written statement calling attention to (something), public notice" (of anything, but often of a sale); from Old French avertissement (15c., later respelled pedantically as advertissement, a change rejected in French but accepted in English), from stem of avertir "to abatedown, strike down; fell, destroy; abolish; reduce, lower" (Modern French abattre), from Vulgar Latin *abbatere, from Latin ad..."to" (see ad-) + battuere "to beat" (see batter (v.))....confutationConfutation of the person in logic is argument ad hominem....introitto celebrate mass," late 15c., from Old French introite "(liturgical) introit; entrance" (14c.), from Latin (antiphona ad...famisha shortening of Old French afamer (12c., Modern French affamer), from Vulgar Latin *affamare "to bring to hunger," from ad...coronertitle of a county or municipal officer with certain duties, mid-14c. (mid-13c. as a surname), corouner, from Anglo-French curuner, from Anglo-Latin custos placitorum coronae (late 12c.), originally the title of the officer with the duty of protecting the private property of the rleaderOld English lædere "one who leads, one first or most prominent," agent noun from lædan "to guide, conduct" (see lead (v.)). Cognate with Old Frisian ledera, Dutch leider, Old High German leitari, German Leiter. As a title for the head of an authoritarian state, from 1918 (translacommunism1843, "social system based on collective ownership," from French communisme (c. 1840), from commun (Old French comun "common, general, free, open, public;" see common (adj.)) + -isme (see -ism). Originally a theory of society. As the name of a political or economic theory w

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‘cite’Page URL:https://www.etymonline.com/word/ad-CopyHTML Link:<a href="https://www.etymonline.com/word/ad-">Etymology of ad- by etymonline</a>CopyAPA Style:Harper, D. (n.d.). Etymology of ad-. Online Etymology Dictionary. Retrieved March 9, 2026, from https://www.etymonline.com/word/ad-CopyChicago Style:Harper Douglas, "Etymology of ad-," Online Etymology Dictionary, accessed March 9, 2026, https://www.etymonline.com/word/ad-.CopyMLA Style:Harper, Douglas. "Etymology of ad-." Online Etymology Dictionary, https://www.etymonline.com/word/ad-. Accessed 9 March, 2026.CopyIEEE Style:D. Harper. "Etymology of ad-." Online Etymology Dictionary. https://www.etymonline.com/word/ad- (accessed March 9, 2026).CopyRemove AdsAdvertisement

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TrendingDictionary entries near ad-

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