| ab | away from, down, off |  | adverb | ab-, a-, abs-, au-[1] | ab | abdication, abduction, aberrant, abnormal, abrasion, absent, absorb, abstain, abstemious, abstraction, aversion, avulsion |
| accipiter | hawk |  | noun | accipitr- | accipiter | Accipiter, accipitrine |
| acidus | acidic, sour |  | adj | acid- | acidus | acidiferous, acidity, acidosis, acidulation, acidulous |
| acutus | sharp, pointed |  | adj | acu-, acut- | acutus, past participle of acuere “to sharpen”, from acus “needle” | acerose, acupuncture, acumen, acute, acutifoliate |
| acētum | sour, vinegar |  | adj | acet- | acētum | acetabulum, acetate, acetic, acetone, acetum, triacetate |
| adeps | fat |  | adj | adip- | adeps, adipis “fat” | adipocellular, adipose |
| ad | movement to or toward; in addition to |  | adverb | ad-, a-, ac-, af-, ag-, al-, am-, an-, ap-, ar-, as-, at-[7] | ad “to”, “toward” | accept,accurate, adapt, addition, address, adept,adherent,adjust,admit,admonish,affect,agglomerate,aggregate,allege,allude |
| aevum | age |  | noun | aev-, ev- | aevum | age, coeval, eon, eternal, longevity, medieval, primeval |
| agere | do, go, move |  | verb | ag-, -ig-, act- | agere, actus | act,agenda, agent, agile, agitate, ambiguous, castigate, cogent, cogitate, excogitate,mitigate,navigate, proactive,react, transaction |
| ager | field |  | noun | agri-, -egri- | ager, agris “field, country” | agriculture, peregrine |
| alacer | cheerful |  | adj | alac- | alacer | alacrity, allegro |
| albus | dull white |  | adj | alb- | albus | albedo, albino, albumen |
| alius | other |  | preposition | ali-, alter- | alius “another”, alter “other” | alias, alibi, alien, alter, alternate, altruism |
| altus | high, deep |  | adj | alt- | altus, altitudo | altimeter, altitude, alto, altocumulus, contralto, exalt |
| ambi | both, on both sides |  | preposition | ambi-, am-, amb-, ambo-, an- | ambi | ambidexterity, ambient, ambiguous, ambit, ambition, ambivalent, amboceptor, amputation, ancipital, andante |
| ambulare | walk |  | verb | ambul- | ambulare | ambulance, ambulatory, amble, perambulate, preamble, somnambulist |
| amicus | friend |  | noun | am-, amic-, -imic- | amicus | amiable, amicable, amity, enemy, enmity, inimical |
| amplus | ample, abundant, bountiful, large |  .png | adj | ampl- | amplus | ample, amplify, amplitude |
| amāre | love, liking |  | adj | am-, amat- | amāre, amatus, amor | amateur, amatory, amenity, amorous, enamoured |
| anima | breath, life, soul, spirit |  | noun | anim- | anima “breath”, “soul” | animal, animation, anime, animism, animus, inanimate, equanimity |
| annus | year, yearly |  | noun | ann-, -enn- | annus “year” | anniversary, annual, centennial, millennium, perennial |
| ante | before, in front of, prior to; old |  | preposition | ante-, anti-[30] | ante “before”, “against”; see also antiquus “old” | antebellum, antecedent, antedate, antediluvian, anteroom, anticipate, antiquarian, antiquate, antique, antiquity |
| aperire | open |  | verb | aper- | aperire | aperient, apéritif, aperitive, aperture, overt, overture, pert |
| apis | bee |  | noun | api- | apis | apian, apiary, apicula, apium; Petrus Apianus |
| aqua | water |  | noun | aqu- | aqua | acquacotta, akvavit, aqua vitae, aquaculture, aquamarine, aquarelle, aquarium, Aquarius, aquatic, aquatile, aqueduct, aqueous, aquifer, aquiferous, aquiform, gouache, semiaquatic |
| arbiter | judge |  | verb | arbit- | arbiter (from ad “to” + baetere “to come, go”) | arbiter, arbitrage, arbitrary, arbitration |
| arcanus | box |  | noun | arcan- | arcanus | arcane, arcanum |
| ardere | heat, glow, passion |  | verb | ard- | ardere “to burn”, arsus | ardent, ardor, arson |
| arduus | difficult |  | adj | ardu- | arduus “high, steep” | arduous |
| argentum | silver |  | noun | argent- | argentum | argent, Argentina |
| ars | art, skill |  | noun | art- | ars, artis | artifact, artifice, artificial, artificiality, artisan |
| asinus | buttocks |  | noun | asin- | asinus | asinine, ass, easel |
| asper | rough |  | adj | asper- | asper “rough” | asperity, exasperate |
| audax | daring |  | adj | audac- | audax “brave, bold, daring”, from audere “to dare” | audacious, audacity |
| audire | hearing, listening, sound |  | verb | aud- | audire “to hear” | audible, audience, audio, audiobook, audiology, audiovisual, audit, audition, auditorium, auditory |
| augēre | grow, increase |  | verb | aug-, auct- | augēre, auctus “to increase” | auction, augend, augment, augmentation, augur, augury, august, author, auxiliary, inauguration |
| auris | relating to the ear |  | noun | auri-, aus- | auris “ear” | aural, auricle, aurinasal, auscultate, auscultation |
| aurum | relating to gold, or gold-colored |  | noun | aur- | aurum “gold” | aureate, aureole |
| avere | desire |  | adj | av- | avere “crave, long for” | avarice, avaricious, avarous, ave, avid, avidity |
| avis | bird |  | noun | avi-, au- | avis | auspice, auspicious, avian, aviary, aviation, aviator |
| axis | axis |  | noun | axi- | axis | axion, axis, axisymmetry |
| ācer | bitter, sharp, sour | | adj | acer-, acri- | ācer, ācris, acerbus, acere | acerbic, acrid, acrimonious, acrimony, exacerbate |
| ārēre | be dry |  | adj | arid- | ārēre “be dry or parched” | arid |
| ărāre | plow, till |  | verb | ara- | ărāre | arability, arable, aration, aratory, exarate, exaration, inarable, nonarable |
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