disaffected (adj.)youdaoicibaDictYouDict[disaffected 词源字典]
"estranged, hostile," usually in reference to authority, 1630s, past participle adjective from disaffect. Related: Disaffectedly; disaffectedness. [disaffected etymology, disaffected origin, 英语词源]
disaffection (n.)youdaoicibaDictYouDict
c. 1600; see dis- + affection.
disagree (v.)youdaoicibaDictYouDict
late 15c., "refuse to assent," from Old French desagreer (12c.), from des- (see dis-) + agreer (see agree). Related: Disagreed; disagreeing.
disagreeable (adj.)youdaoicibaDictYouDict
c. 1400, "not in agreement," from Old French desagreable (13c.), from des- (see dis-) + agreable (see agreeable). Meaning "not in accord with one's taste" is from 1690s. Related: Disagreeably; disagreeableness. Slightly earlier in same sense was unagreeable (late 14c.).
disagreement (n.)youdaoicibaDictYouDict
late 15c.; see dis- + agreement.
disallow (v.)youdaoicibaDictYouDict
late 14c., "to refuse to praise," from Old French desalouer "to blame," from des- (see dis-) + alouer (see allow); meaning "to reject" is from 1550s. Related: Disallowed; disallowing; disallowance.
disallowable (adj.)youdaoicibaDictYouDict
mid-15c., from disallow + -able.
disambiguate (v.)youdaoicibaDictYouDict
1963, back-formation from disambiguation. Related: Disambiguated; disambiguating.
disambiguation (n.)youdaoicibaDictYouDict
1827; see dis- + ambiguous + -ation.
disappear (v.)youdaoicibaDictYouDict
early 15c., disaperen, from dis- "do the opposite of" + appear. Earlier was disparish (early 15c.), from French disparaiss-, stem of disparaître. Transitive sense. "cause to disappear," is from 1897 in chemistry; by 1948 of inconvenient persons. Related: Disappeared; disappearing; disappears. Slang disappearing act is originally of magic shows; in figurative sense of "getting away" first attested 1913.
disappearance (n.)youdaoicibaDictYouDict
1712; see disappear + -ance.
disappoint (v.)youdaoicibaDictYouDict
early 15c., "dispossess of appointed office," from Middle French desappointer (14c.) "undo the appointment, remove from office," from des- (see dis-) + appointer "appoint" (see appoint).

Modern sense of "to frustrate expectations" (late 15c.) is from secondary meaning of "fail to keep an appointment." Related: Disappointed; disappointing.
disappointed (adj.)youdaoicibaDictYouDict
1550s, past participle adjective from disappoint. Related: Disappointedly.
disappointment (n.)youdaoicibaDictYouDict
1610s, "fact of disappointing;" see disappoint + -ment. Meaning "state or feeling of being disappointed" is from 1756. Meaning "a thing that disappoints" is from 1756.
disapprobation (n.)youdaoicibaDictYouDict
1640s; see dis- + approbation.
disapproval (n.)youdaoicibaDictYouDict
1660s; see disapprove + -al (2).
disapprove (v.)youdaoicibaDictYouDict
late 15c., "disprove;" as the reverse of approve it is first attested 1640s. See dis- + approve. Related: Disapproved; disapproving.
disarm (v.)youdaoicibaDictYouDict
late 14c., from Old French desarmer (11c.), from des- (see dis-) + armer "to arm" (see arm (v.)). The figurative sense is slightly earlier in English than the literal. Related: Disarmed; disarming.
disarmament (n.)youdaoicibaDictYouDict
1795; see dis- + armament.
disarray (v.)youdaoicibaDictYouDict
late 14c.; see dis- "lack of" + array. Perhaps formed on the analogy of Old French desareer.