"churning" in the verb sense
stir (cream) vigorously in order to make butter
2. churn, boil, moil, roil
"the sea was churning in the storm"
"churning" in the adjective sense
1. churning, churned-up
moving with or producing or produced by vigorous agitation
"winds whipped the piled leaves into churning masses"
"a car stuck in the churned-up mud"
2. churning, roiling, roiled, roily, turbulent
of a liquid) agitated vigorously in a state of turbulence
"the river's roiling current"
Source: WordNet® (An amazing lexical database of English)
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