Definition of roil verb from the Oxford Advanced American Dictionary

     

    roil

     verb
    verb
    NAmE//rɔɪl//
     
    Verb Forms present simple I / you / we / they roil he / she / it roils past simple roiled -ing form roiling
     
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  1. 1roil something to stir up the mud or other material that settles at the bottom of water Strong winds roil these waters.
  2. 2roil somebody/something to disturb or upset someone or something The financial scandal has roiled the stock market.
See the Oxford Advanced Learner's Dictionary entry: roil