1. (v. t.) To render turbid or muddy; to stir up; to roil.

2. (v. t.) To stir up in feelings; to make angry; to vex.

aggravate agitate annoy arouse badger bait be at beat beat up bedevil beset bother bristle brown off bug bullyrag burn up chafe chivy churn churn up convulse devil disarrange discompose disquiet distemper disturb dog embitter exasperate excite exercise fash ferment flurry fret get grate gripe harass harry heckle hector hound huff incense inflame irk irritate miff molest mud muddle muddy nag needle nettle nudzh paddle peeve persecute perturb perturbate pester pick on pique plague pluck the beard pother provoke put out rankle ride ripple roil roughen ruffle rumple set up shake shake up stir stir the blood stir up swirl tease torment trouble try the patience tweak the nose upset vex whip whip up whisk work up worry