WordWeb Online

1. Cause annoyance in; disturb, especially by minor irritations
   - annoy, rag, get to, bother, get at, irritate, nark [Brit], nettle, gravel [US], vex, chafe, devil
    
2. Make turbid by stirring up the sediments of
   - roil

Derived forms: riled, riles, riling

Type of: agitate, commove, displease, disturb, raise up, shake up, stir up, vex