troubleyoudaoicibaDictYouDict[trouble 词源字典]
trouble: [13] Trouble is etymologically something that ‘disturbs’ one – indeed, the two words are related. Trouble was borrowed from Old French trouble or tourble, a derivative of the verb tourbler. This was descended from Vulgar Latin *turbulāre, a derivative of *turbulus, which in turn was an alteration of Latin turbidus ‘wild, confused, muddy’ (source of English turbid [17]).

And turbidus itself was derived from turba ‘disturbance, crowd’ (a borrowing from Greek túrbē ‘disorder’), which also produced the verb turbāre ‘disturb’ (source of English disturb [13] and turbulent [16]). Turbine too is closely related.
=> disturb, turbid, turbine, turbulent[trouble etymology, trouble origin, 英语词源]
trouble (v.)youdaoicibaDictYouDict
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.
trouble (n.)youdaoicibaDictYouDict
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.