英语词源字典 - 在线词源网站

diachronic (adj.)[diachronic 词源字典]: 1857, from Greek dia "throughout" (see dia-) + khronos "time" (see chrono-). Use in linguistics dates from 1927.[diachronic etymology, diachronic origin, 英语词源]
diacritic (adj.): 1690s, of sounds, from Greek diakritikos "that separates or distinguishes," from diakrinein "to separate one from another," from dia- (see dia-) + krinein "to separate, decide, judge" (see crisis). As a noun, from 1866. Related: Diacritical.
diadem (n.): late 13c., from Old French diademe and directly from Latin diadema "cloth band worn around the head as a sign of royalty," from Greek diadema, from diadein "to bind across," from dia- "across" (see dia-) + dein "to bind," related to desmos "band," from PIE *de- "to bind." Used of the headband worn by Persian kings and adopted by Alexander the Great and his successors.
diagnose (v.): 1861, back-formation from diagnosis. Related: Diagnosed; diagnosing.
diagnoses (n.): plural of diagnosis.
diagnosis (n.): 1680s, medical Latin application of Greek diagnosis "a discerning, distinguishing," from stem of diagignoskein "discern, distinguish," literally "to know thoroughly," from dia- "apart" (see dia-) + gignoskein "to learn" (see gnostic).
diagnostic: 1620s (adjective and noun), from Greek diagnostikos "able to distinguish," from diagnostos, verbal adjective from diagignoskein (see diagnosis). Related: Diagnostics.
diagonal (adj.): 1540s (implied in diagonally), from Middle French diagonal, from Latin diagonalis, from diagonus "slanting line," from Greek diagonios "from angle to angle," from dia- "across" (see dia-) + gonia "angle" (see -gon). As a noun, from 1570s.
diagram (n.): 1610s, from French diagramme, from Latin diagramma, from Greek diagramma "geometric figure, that which is marked out by lines," from diagraphein "mark out by lines, delineate," from dia- "across, out" (see dia-) + graphein "write, mark, draw" (see -graphy). The verb is 1840, from the noun.
dial (n.): early 15c., "sundial," earlier "dial of a compass" (mid-14c.), apparently from Medieval Latin dialis "daily," from Latin dies "day" (see diurnal).

The word perhaps was abstracted from a phrase such as Medieval Latin rota dialis "daily wheel," and evolved to mean any round plate over which something rotates. Telephone sense is from 1879, which led to dial tone (1921), "the signal to begin dialing," which term soon might be the sole relic of the rotary phone.
dial (v.): 1650s, "to work with aid of a dial or compass," from dial (n.). Telephone sense is from 1923. Related: Dialed; dialing.
dialect (n.): 1570s, "form of speech of a region or group," from Middle French dialecte, from Latin dialectus "local language, way of speaking, conversation," from Greek dialektos "talk, conversation, speech;" also "the language of a country, dialect," from dialegesthai "converse with each other," from dia- "across, between" (see dia-) + legein "speak" (see lecture (n.)).
dialectal (adj.): 1831, from dialect + -al (1).
dialectic (n.): 1580s, earlier dialatik (late 14c.), from Old French dialectique (12c.), from Latin dialectica, from Greek dialektike (techne) "(art of) philosophical discussion or discourse," fem. of dialektikos "of conversation, discourse," from dialektos "discourse, conversation" (see dialect). Originally synonymous with logic; in modern philosophy refined by Kant, then by Hegel, who made it mean "process of resolving or merging contradictions in character." Related: Dialectics.
dialectical (adj.): "argumentative," 1540s; see dialectic + -al (1).
dialog: see dialogue.
dialogue (n.): early 13c., "literary work consisting of a conversation between two or more persons," from Old French dialoge, from Latin dialogus, from Greek dialogos "conversation, dialogue," related to dialogesthai "converse," from dia- "across" (see dia-) + legein "speak" (see lecture (n.)).

Sense broadened to "a conversation" c. 1400. Mistaken belief that it can only mean "conversation between two persons" is from confusion of dia- and di- (1); the error goes back to at least 1532, when trialogue was coined needlessly for "a conversation between three persons." A word that has been used for "conversation between two persons" is the hybrid duologue (1864).
dialysis (n.): 1580s, from Latin, from Greek dialysis "dissolution, separation" (of the disbanding of troops, a divorce, etc.), from dialyein "dissolve, separate," from dia- "apart" + lyein "loosen" (see lose). Used originally in logic and grammar; chemistry sense is first recorded 1861, medicine 1914. Related: Dialytic.
diamante (adj.): 1904, from French diamanté, past participle of diamanter "to set with diamonds," from Old French diamant (see diamond).
diameter (n.): late 14c., from Old French diametre, from Latin diametrus, from Greek diametros (gramme) "diagonal of a circle," from dia- "across, through" (see dia-) + metron "a measure" (see meter (n.2)).