dissimulation (n.)youdaoicibaDictYouDict[dissimulation 词源字典]
late 14c., from Old French dissimulation (12c.), from Latin dissimulationem (nominative dissimulatio) "a disguising, concealment," noun of action from past participle stem of dissimulare "make unlike, conceal, disguise," from dis- "completely" + simulare "pretend, assume, simulate" (see simulation).[dissimulation etymology, dissimulation origin, 英语词源]
dissipate (v.)youdaoicibaDictYouDict
early 15c., from Latin dissipatus, past participle of dissipare "to spread abroad, scatter, disperse; squander, disintegrate," from dis- "apart" (see dis-) + supare "to throw, scatter," from PIE *swep- "to throw, sling, cast" (cognates: Lithuanian supu "to swing, rock," Old Church Slavonic supo "to strew"). Related: Dissipated; dissipates; dissipating.
dissipation (n.)youdaoicibaDictYouDict
early 15c., "act of scattering," from Latin dissipationem (nominative dissipatio), noun of action from past participle stem of dissipare (see dissipate). Meaning "intemperate mode of living" is from 1784.
dissociate (v.)youdaoicibaDictYouDict
1610s (implied in dissociated), from Latin dissociatus, past participle of dissociare "to separate from companionship, disunite, set at variance," from dis- "apart" (see dis-) + sociare "to join," from socius "companion" (see social (adj.)). Attested from 1540s as a past participle adjective meaning "separated."
dissociation (n.)youdaoicibaDictYouDict
1610s, from French dissociation, from Latin dissociationem (nominative dissociatio), noun of action from past participle stem of dissociare (see dissociate).
dissolute (adj.)youdaoicibaDictYouDict
late 14c., "loose, negligent, morally or religiously lax," from Latin dissolutus "loose, disconnected," past participle of dissolvere "loosen up" (see dissolve). A figurative use of the classical Latin word. Related: Dissolutely; dissoluteness.
dissolution (n.)youdaoicibaDictYouDict
late 14c., "separation into parts," also "frivolity, moral laxness, dissolute living," from Old French dissolution (12c.) and directly from Latin dissolutionem (nominative dissolutio) "a dissolving, destroying, interruption, dissolution," noun of action from past participle stem of dissolvere (see dissolve).
dissolve (v.)youdaoicibaDictYouDict
late 14c. (transitive and intransitive) "to break up" (of material substances), from Latin dissolvere "to loosen up, break apart," from dis- "apart" (see dis-) + solvere "to loose, loosen" (see solve). Meaning "to disband" (an assembly) is early 15c. Related: Dissolved; dissolving.
dissonance (n.)youdaoicibaDictYouDict
early 15c., "disagreement," from Middle French dissonance and directly from Late Latin dissonantia, from Latin dissonantem (see dissonant). Figurative use dates from 1875.
dissonant (adj.)youdaoicibaDictYouDict
early 15c., from Middle French dissonant and directly from Latin dissonantem (nominative dissonans), present participle of dissonare "differ in sound," from dis- "apart" (see dis-) + sonare "to sound" (see sonata).
dissuade (v.)youdaoicibaDictYouDict
1510s, from Middle French dissuader and directly from Latin dissuadere "to advise against, oppose by argument," from dis- "off, against" (see dis-) + suadere "to urge" (see suasion). Related: Dissuaded; dissuading.
dissuasion (n.)youdaoicibaDictYouDict
early 15c., from Latin dissuasionem (nominative dissuasio) "an advice to the contrary," noun of action from past participle stem of dissuadere (see dissuade).
distaff (n.)youdaoicibaDictYouDict
Old English distæf "stick that holds flax for spinning," from dis- "bunch of flax" (cognates: Middle Low German dise, Low German diesse "a bunch of flax on a distaff;" see bedizen) + stæf "stick, staff" (see staff).

A synonym in English for "the female sex, female authority in the family," since at least the late 1400s, probably because in the Middle Ages spinning was typically done by women. St. Distaff's Day was Jan. 7, when "women resumed their spinning and other ordinary employments after the holidays" [OED].
distal (adj.)youdaoicibaDictYouDict
1808, formed from distant + -al (1) on model of central, dorsal, ventral, etc.
distance (n.)youdaoicibaDictYouDict
late 13c., "quarrel, estrangement, discord, strife," from Old French destance (13c.), from Latin distantia "a standing apart," from distantem (nominative distans) "standing apart, separate, distant," present participle of distare "stand apart," from dis- "apart, off" (see dis-) + stare "to stand," from PIE root *sta- "to stand, set down, make or be firm" (see stet).

Meaning "remoteness, space between things or places" is late 14c. The figurative sense of "aloofness" is the same as in stand-offish. Phrase go the distance (1930s) seems to be originally from the prize ring, where the word meant "scheduled length of a bout."
distance (v.)youdaoicibaDictYouDict
1570s (transitive); 1640s (intransitive), from distance (n.). Related: Distanced; distancing.
distant (adj.)youdaoicibaDictYouDict
late 14c., from Old French distant (14c.), from Latin distantem (nominative distans), present participle of distare "to stand apart, be remote" (see distance (n.)). Related: Distantly.
distaste (n.)youdaoicibaDictYouDict
1590s, from dis- + taste.
distasteful (adj.)youdaoicibaDictYouDict
c. 1600, from distaste + -ful. Related: Distastefully; distastefulness.
distelfink (n.)youdaoicibaDictYouDict
Pennsylvania Dutch ornamental bird design, from German Distelfink "goldfinch," literally "thistle-finch," from Old High German distilvinko, from distil "thistle" (see thistle) + Old High German finco "finch," from PIE *(s)ping- "sparrow, finch" (see finch). The bird so called because it feeds on thistle seeds. Compare Old French chardonel "goldfinch," from chardon "thistle."