Definition of roily in US English:

roily

adjective

North American
  • (chiefly of water) muddy; turbulent.

    ‘those waters were roily, high and muddy’
    rough, stormy, tempestuous, storm-tossed, heavy, violent, wild, angry, raging, boiling, seething, foaming, choppy, bumpy, agitated
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Pronunciation

roily

/ˈroilē/