verb/tʁu.ble/
to disturb, disrupt (order, sleep, judgement etc.); to disturb, to trouble (someone); to cloud, become cloudy (of water); to become cloudy, become overcast (of sky); to become flustered
Inherited from Old French trobler, trubler, with metathesis from torbler, tourbler, turbler, from Vulgar Latin *turbulāre, itself either from Latin turbāre or from turbula, diminutive of turba. Compare Occitan trebolar, Romanian tulbura.