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audacity (n.)[audacity 词源字典]: mid-15c., from Medieval Latin audacitas "boldness," from Latin audacis genitive of audax (see audacious).[audacity etymology, audacity origin, 英语词源]
audible (adj.): 1520s, from Middle French audible and directly from Late Latin audibilis, from Latin audire "to hear," from PIE *awis-dh-yo-, from root *au- "to perceive" (see audience). Related: Audibly.
audience (n.): late 14c., "the action of hearing," from Old French audience, from Latin audentia "a hearing, listening," from audientum (nominative audiens), present participle of audire "to hear," from PIE compound *au-dh- "to perceive physically, grasp," from root *au- "to perceive" (cognates: Greek aisthanesthai "to feel;" Sanskrit avih, Avestan avish "openly, evidently;" Old Church Slavonic javiti "to reveal"). Meaning "formal hearing or reception" is from late 14c.; that of "persons within hearing range, assembly of listeners" is from early 15c. (French audience retains only the older senses). Sense transferred 1855 to "readers of a book." Audience-participation (adj.) first recorded 1940.
audio (n.): "sound," especially recorded or transmitted, 1934, abstracted from prefix audio- (in audio-frequency, 1919, etc.), from Latin audire "hear" (see audience).
audio-: word-forming element meaning "sound, hearing," from comb. form of Latin audire "hear," (see audience); first used in English as a word-formation element 1913.
audiology (n.): science of hearing and treatment of deafness, 1946, from audio- + -ology. Related: Audiologist.
audiophile (n.): 1951, originally in "High Fidelity" magazine, from audio- + -phile.
audiotape (n.): 1957, from audio- + tape (n.).
audiovisual (adj.): also audio-visual, 1937, from audio- + visual.
audit (n.): early 15c., from Latin auditus "a hearing," past participle of audire "hear" (see audience). Official examination of accounts, which originally was an oral procedure.
audit (v.): mid-15c., from audit (n.). Related: Audited; auditing.
audition (v.): "to try out for a performance part," 1935, from audition (n.). Transitive sense by 1944. Related: Auditioned; auditioning.
audition (n.): 1590s, "power of hearing," from Middle French audicion "hearing (in a court of law)," from Latin auditionem (nominative auditio) "a hearing, listening to," noun of action from past participle stem of audire "hear" (see audience). Meaning "trial for a performer" first recorded 1881.
auditor (n.): early 14c., "official who receives and examines accounts;" late 14c., "a listener," from Anglo-French auditour (Old French oieor "listener, court clerk," 13c.; Modern French auditeur), from Latin auditor "a hearer," from auditus, past participle of audire "to hear" (see audience). Meaning "receiver and examiner of accounts" is because this process formerly was done, and vouched for, orally.
auditorium (n.): 1727, from Latin auditorium "lecture room," literally "place where something is heard," neuter of auditorius (adj.) "of or for hearing," from auditus, past participle of audire "to hear" (see audience); also see -ory. Earlier in the same sense was auditory (late 14c.).
auditory (adj.): 1570s, from Latin auditorius "pertaining to hearing," from auditor "hearer" (see auditor).
Audrey: fem. proper name, contracted from Etheldreda, a Latinized form of Old English Æðelðryð, literally "noble might," from æðele "noble" (see atheling) + ðryð "strength, might."
Audubon: with reference to birds or pictures of them, from U.S. naturalist John James Audubon (1785-1851).
Aufklarung (n.): 1801, from German Aufklärung (18c.), literally "Enlightenment," from aufklären "to enlighten" (17c.), from auf "up" + klären "to clear," from Latin clarus (see clear (adj.)).
Augean (adj.): "filthy," 1590s, in reference to Augean stable, the cleansing of which was one of the labors of Herakles, from Greek Augeias, like the stable of Augeas, king of Elis, which contained 3,000 oxen and had gone uncleansed for 30 years. Herakles purified it in one day by turning the river Alpheus through it.