| abdomen | abdominal |
| aboleo | abolish, abolition, abolitionist |
| aceo | acetanilid(e), acetate, acetic, acetylene, acid, acidity |
| acer | acrid, acrimonious, acrimony, eager, eagerly, eagerness, vinegar |
| acuo | acumen, acute, acuteness, ague, cute |
| acus | eglantine |
| adipiscor | see aptius |
| administro | see minister |
| admiror | see mirus |
| adolesco | see alo |
| adulor | adulation |
| adulter | see alter |
| aedis | edification, edifice, edify |
| aemulus | emulate, emulation, emulous |
| aequus | adequate, adequately, equable, equal, equality, equalization, equalize, equalizer, equally, equanimity, equation, equator, equatorial, equinox, equipoise, equitable, equity, equivalent, equivocal, equivocate, equivocation, inadequacy, inadequate, inequality, iniquitous, iniquity, unequal, unequaled, unequivocal |
| aes | era |
| aestimo | aim, aimless, disesteem, esteem, estimable, estimate, estimation, inestimable, overestimate, underestimate |
| aestus | estuary |
| aetas | see aevum |
| aevum | age, aged, coeval, eternal, eternally, eternity, longevity, medieval, middle-age, old-age, primeval |
| ager | agrarian, agricultural, agriculture, agriculturist, peregrination, pilgrim, pilgrimage |
| agger | exaggerate, exaggeration |
| ago | act, acting (adj.), action, active, actively, activity, actress, actual, actuality, actually, actuate, agency, agent, agile, agility, agitate, agitation, agitator, ambiguity, ambiguous, assay, circumnavigate, coagulate, coagulation, cogency, cogent, cogitate, cogitation, counteract, enact, exacting (adj.), exaction, exactitude, exactly, exactness, examination, examine, examiner, exigency, exigent, inaction, inactive, inactivity, interation, navigable, navigate, navigation, navigator, prodigal, prodigality, react, reaction, reactionary, reagent, squat, squatter, transact, transation |
| aio | adage |
| ala | aqisle |
| alacer | alacrity |
| albus | albino, albumen, albumin, auburn, bedaub, daub, dauber |
| aliquis | hidalgo: see also alius and quis |
| alius | alien, alienate, alienation, inalienable; see also alter |
| alo | adolescene, adolescent, adult, aliment, alimentary, alimony, coalesce, coalescene, coalition; see also altus and proles |
| alter | adulterate, adulteration, adulterer, adulteress, adulterous, adultery, alter, alteration, altercation, alternate, alternately, alteration, altruistic, subaltern, unadulterated, unalterable, unalterably, unaltered; see also alius |
| altus | altar, altitude, alto, contralto, enhance, exalt, exaltation, haughtily, haughtiness, haughty, haut, hauteur, oboe; see also alo |
| alumen | alum, aluminum |
| amarus | maraschino |
| ambulo | amble, ambulance, perambulate, perambulator, preamble |
| amicitia | see amo |
| amicus | see amo |
| amita | aunt |
| amo | amateur, amatory, amiable, amiably, amicable, amity, amorous, amour, enamor, enemy, enmity, inimical, paramous |
| amoenus | amenity |
| ampius | ample, amplification, amplifier, amplify, amplitude, amply |
| amuletum | amulet |
| ango | anguish, anxiety, anxious, anxiously |
| anguius | angle, angular, angularity, quadrangle, quadrangular, rectangle, rectangular, triangle, triangular |
| anima | animla, animate, animated (adj.), animation, inanimate; see also animus |
| animus | animadversion, animadvert, animosity, equanimity, magnanimity, magnanimous, pusillanimity, pusillanimous, unanimity, unanimous, unanmiously; see also anima |
| annus | annal, annlist, anniversary, annual, annually, annuity, biennial, centennial, millennium, perennial, superannuate, riennial |
| ante (adv.) | advance, advanced (adj.), advancement, advantage, advantageous, ancient, anterior, antics, antiquarian, antiquary, antiquated, antique, antiquity, avaunt, disadvantage, disadvantageous, vamp ( of a shoe or boot), vanguard, vantage |
| antiquus | see ante |
| anus | anal |
| anxietas | see ango |
| anxius | see ango |
| aperio | aperture, overt, overture, pert |
| applio (appelare) | appeal, appealing, appellant, appelate, appellation |
| aptius | adapt, adaptability, adaptable, adaptation, adept, apt, aptitude, aptly, aptness, attitude, couple, couplet, coupling, inept, lariat, uncouple |
| aqua | aquarium, aquatic, aqueduct, aqueous, ewer, sewage, sewer, sewerage |
| aquila | aquiline, eagle, eaglet |
| arbiter | arbitrament, arbitrarily, arbitrary, arbitrate, arbitration, abitrator, arbitress |
| arca | ark; see also arceo |
| arceo | corce, coercion, cercive, exercise |
| arcus | arc, arcade, arch, arched, archer, archery, archway, overarch |
| ardeo | ardent, ardently, arson |
| arduus | arduous |
| areo | arid |
| argentum | argent |
| arguo | argue, argument, argumentative |
| arma (pl.) | alarm, alarum, arm (verb), armada, armadillo, armament, armature, armistice, armor, armored, armorer, armorial, armory, army, disarm, disarmament, firearm, gendarme, unarm, unarmed (adj.) |
| aro | arable |
| ars | art, artful, artfully, artifice, artificer, artificial, artifica\ially, artillery, artisan, artist, artiste, artistic, artistically, artistry, artless, insert, insertia |
| artus | article, articulate, articulation, inarticulate |
| as | ace |
| asinus | asinine, ass, easel, jackass |
| asper | asperity, exasperate, exasperation |
| astus | astute, astuteness |
| atrox | atrocious, atrocity |
| auctor | see augeo |
| auctoritas | see augeo |
| audeo | audacious, audacity |
| audio | audible, audibly, audience, audit, auditory, disobedience, disobedient, disobey, inaudible, obeidience, obedient, obediently, obeisance, obey |
| augeo | auction, auctioneer, augment, augmentation, august, author, authoritative, authority, authorization, authorize, authorship, auxiliary, unauthorized |
| augur | augury, inaugural, inaugurate, inauguration |
| auris | auricle, auricular |
| aurum | aureole, oriole |
| ausculto | scout, scoutmaster |
| autumnus | autumn, autumnal |
| auxilium | see augeo |
| aveo | avarice, avaricious, avid, avidity |
| avis | auspice, auspicious, aviary, aviation, aviator, inauspicious |
| avus | uncle |
| axis | axial, axile |
