"dissuasion, advice or counsel to the contrary of what is proposed," 1520s, from Late Latin dehortationem (nominative dehortatio), noun of action from past-participle stem of Latin dehortari "to dissuade," from de- "off, away" (see de-) + hortari "to exhort, urge, incite," from PIE root *gher- (2) "to like, want."
"to look on at a card game and offer unwelcome advice," 1915, from Yiddish kibitsen "to offer gratuitous advice as an outsider," from German kiebitzen "to look on at cards, to kibitz," originally in Rotwelsch (thieves' cant) "to visit," from Kiebitz, name of a shore bird (European peewit, lapwing) with a folk reputation as a meddler, from Middle High German gibitz "pewit," imitative of its cry (see peewit). Young lapwings are proverbially precocious and active, and were said to run around with half-shells still on their heads soon after hatching. Related: Kibitzing. Also see kibitzer.
c. 1300, counseilen, "to give or offer advice, admonish, instruct," from Old French conseiller "to advise, counsel," from Latin consiliari, from consilium "plan, opinion," from assimilated form of com "with, together" (see con-) + root of calare "to announce, summon" (from PIE root *kele- (2) "to shout"). Related: Counseled.
1520s, in grammar, "expressing command," used of the form of a verb which expresses command, entreaty, advice, or exhortation, from Late Latin imperativus "pertaining to a command," from imperat-, past participle stem of imperare "to command, requisition," from assimilated form of in- "into, in" (from PIE root *en "in") + parare "to arrange, prepare, adorn" (from PIE root *pere- (1) "to produce, procure").