late 15c., "person appointed and sent by another or others with power to transact business as a representative," from the past-participle adjective (early 15c.), from Old French delegat or directly from Latin delegatus, past participle of delegare "to send as a representative," from de- "from, away" (see de-) + legare "send with a commission," possibly literally "engage by contract" and related to lex (genitive legis) "contract, law," from PIE root *leg- (1) "to collect, gather."
Sense of "person sent with representative powers to a convention, conference, etc." is from c. 1600. In U.S., "person elected or appointed to represent a territory in Congress," by 1825.
"act of relegating, banishment," 1580s, from Latin relegationem (nominative relegatio) "a sending away, exiling, banishing," a specific term in ancient Roman law and later ecclesiastical law, noun of action from past-participle stem of relegare "remove, dismiss, banish, send away, schedule, put aside" (see relegate).
"partial or incomplete paralysis," as that affecting motion but not sensation, 1690s, Modern Latin, from Greek paresis "slackening of strength, paralysis," literally "a letting go," from stem of parienai "to let go," from para- (see para- (1)) + hienai "to send, throw" (from PIE root *ye- "to throw, impel").
early 15c., omitten, "fail to use or do, fail or neglect to mention or speak of, to disregard," from Latin omittere "let go, let fall," figuratively "lay aside, disregard," from assimilated form of ob (here perhaps intensive) + mittere "let go, send" (see mission). Related: Omitted; omitting.
"the entire scenery and properties of a stage play," 1830, from French mise en scène, literally "setting on the stage," from mise (13c.) "a putting, placing," noun use of fem. past participle of mettre "to put, place," from Latin mittere "to send" (see mission). Hence, figuratively, "the surroundings of an event" (1872).