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ascites (n.)[ascites 词源字典]: late 14c., "abdominal dropsy," from Latin ascites, from Greek askites (hydrops), literally "baglike dropsy," from askos "bag, sac."[ascites etymology, ascites origin, 英语词源]
ascitic (adj.): "afflicted with ascites," 1680s; see ascites + -ic. Related: Ascitical.
Asclepius: god of medicine, Latin, from Greek Asklepios, which is of unknown origin.
ascorbic (adj.): 1933 (in ascorbic acid), from a- (2) + scorb(ut)ic "of scurvy" (from Medieval Latin scorbuticus "scurvy"); originally in reference to Vitamin C, which is an anti-scorbutic. The Latin word is perhaps of German or Dutch origin.
Ascot: village near Windsor, Berkshire; site of fashionable race-meeting. Used attributively for clothes suitable for the event; especially a type of tie (1908). The town name is literally "eastern cottage."
ascribable (adj.): 1670s, from ascribe + -able. Related: Ascribably; ascribability.
ascribe (v.): mid-14c., ascrive, from Old French ascrivre "to inscribe; attribute, impute," from Latin ascribere "to write in, to add to in a writing," from ad- "to" (see ad-) + scribere "to write" (see script (n.)). Spelling restored by 16c. Related: Ascribed; ascribing.
ascription (n.): 1590s, "action of adding in writing;" c. 1600, "attribution of authorship or origin," from Latin ascriptionem (nominative ascriptio) "an addition in writing," noun of action from past participle stem of ascribere (see ascribe).
ascus (n.): "sac in certain fungi," 1830, Modern Latin, from Greek askos "leather bag, wine skin," which is of unknown origin.
asea (adj.): 1858, from a- (1) "on" + sea.
ASEAN: initialism (acronym) for Association of South-East Asian Nations, formed 1967 by Indonesia, Malaysia, the Philippines, Singapore, and Thailand; since expanded to 10 nations.
aseismic (n.): "resistant to earthquake destruction," 1884, from a- (2) "not" + seismic.
aseity (n.): "being by itself," 1690s, from Medieval Latin aseitas "state of being by itself," from Latin a "from" + se "oneself" (see suicide).
asepsis (n.): 1892, from a- (2) "not" + sepsis.
aseptic (adj.): 1859, from a- (2) "not" + septic. As a noun from 1884.
asexual (adj.): 1830, as a term in biology, a hybrid from a- (2) "not" + sexual. In general contexts, attested from 1896.
asexuality (n.): 1877; see asexual + -ity.
asexually (adv.): 1862; see asexual + -ly (2).
Asgard (n.): home of the gods in Norse religion, from Old Norse ass "god," from Proto-Germanic *ansu- (cognates: Old High German ansi, Old English os, Gothic ans "god"), from PIE *ansu- "spirit" (cognates: first element in Ahura Mazda, from Avestan) + Old Norse garðr "enclosure, yard, garden" (see yard (n.1)).
ash (n.1): "powdery remains of fire," Old English æsce "ash," from Proto-Germanic *askon (cognates: Old Norse and Swedish aska, Old High German asca, German asche, Gothic azgo "ashes"), from PIE root *ai- (2) "to burn, glow" (cognates: Sanskrit asah "ashes, dust," Armenian azazem "I dry up," Greek azein "to dry up, parch," Latin ardus "parched, dry"). Spanish and Portuguese ascua "red-hot coal" are Germanic loan-words.

Symbol of grief or repentance; hence Ash Wednesday (c. 1300), from custom introduced by Pope Gregory the Great of sprinkling ashes on the heads of penitents on the first day of Lent. Ashes meaning "mortal remains of a person" is late 13c., in reference to the ancient custom of cremation.