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early 13c., from Old French trubler (11c.), metathesis of turbler, from Vulgar Latin *turbulare, from Late Latin turbidare "to trouble, make turbid," from Latin turbidus (see turbid). Related: Troubled; troubling.
c.1200, "agitation of the mind, emotional turmoil," from Old French truble, related to trubler (see trouble (v.)). From early 15c. as "a concern, a cause for worry." The Troubles in reference to times of violence and unrest in Ireland is attested from 1880, in reference to the rebellion of 1640s.
Toproduce anddisplay for admiration: Oh Lord, he's trotting out his war record again (1845+)