Origin and history of HIV

mid-15c., humain, humaigne, "human," from Old French humain, umain (adj.) "of or belonging to man" (12c.), from Latin humanus "of man, human," also "humane, philanthropic, kind, gentle, polite; learned, refined, civilized." This is in part from PIE *(dh)ghomon-, literally "earthl

late 14c., "poisonous substance" (a sense now archaic), from Latin virus "poison, sap of plants, slimy liquid, a potent juice," from Proto-Italic *weis-o-(s-) "poison," which is probably from a PIE root *ueis-, perhaps originally meaning "to melt away, to flow," used of foul or m

mid-14c., "demon;" late 14c., "a ragged lout," also in surnames (Isabella Ragamuffyn, 1344), from Middle English raggi "ragged" ("rag-y"?) + "fanciful ending" [OED], or else perhaps second the element is Middle Dutch muffe "mitten." Or, as Johnson has it, "From rag and I know not

late 14c., "the highest faculty of the mind, capacity for comprehending general truths;" c. 1400, "faculty of understanding, comprehension," from Old French intelligence (12c.) and directly from Latin intelligentia, intellegentia "understanding, knowledge, power of discerning; ar

Middle English answere, from Old English andswaru "a response, a reply to a question," from and- "against" (from PIE root *ant- "front, forehead," with derivatives meaning "in front of, before") + -swaru "affirmation," from swerian "to swear" (see swear). The proposed etymology s

fabulous monster of Greek mythology, slain by Bellerophon, late 14c., from Old French chimere or directly from Medieval Latin chimera, from Latin Chimaera, from Greek khimaira, name of a mythical fire-breathing creature (slain by Bellerophon) with a lion's head, a goat's body, an

1843, "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

late 14c., "to give in charge, entrust," from Latin committere "to unite, connect, combine; to bring together," from com "with, together" (see com-) + mittere "to release, let go; send, throw" (see mission). The evolution of the modern range of meanings in English is not entirely

late 13c., sustenen, transitive, "provide the necessities of life to;" by early 14c. as "give support to (an effort or cause); also in physical senses, "keep from falling or sinking, hold up or upright;" also "give assistance to; keep (a quarrel, etc.) going." It is from the stem

1852, from German Kinder-Garten (1840), literally "children-garden, garden of children," a metaphoric name from Kinder "children" (plural of Kind "child;" see kin (n.)) + Garten "garden" (from suffixed form of PIE root *gher- (1) "to grasp, enclose"). Coined by German educator Fr