trouble (n.) Look up trouble at Dictionary.com
c. 1200, "agitation of the mind, emotional turmoil," from Old French truble, torble "trouble, disturbance" (12c.), from trubler/torbler (see trouble (v.)). From early 15c. as "a concern, a cause for worry;" 1590s as "something that causes trouble." Meaning "unpleasant relations with the authorities" is from 1550s. Related: Troubles (1510s). Trouble and strife as rhyming slang for "wife" is recorded from 1908.
trouble (v.) Look up trouble at Dictionary.com
c. 1200, from Old French trubler, metathesis of turbler, torbler "to trouble, disturb; make cloudy, stir up, mix" (11c.), from Vulgar Latin *turbulare, from Late Latin turbidare "to trouble, make turbid," from Latin turbidus (see turbid). Related: Troubled; troubling.