Meaning

noun a source of difficulty

noun an angry disturbance

noun an event causing distress or pain

originVerb is from Middle English troublen, trouble, borrowed from Old French troubler, trobler, trubler, metathetic variants of tourbler, torbler, turbler, from Vulgar Latin *turbulō, from Latin turbula (“disorderly group, a little crowd or people”), diminutive of turba (“stir; crowd”). The noun is from Middle English trouble, troble, from Old French troble, from the verb.

Etymology from Wiktionary, CC BY-SA 3.0