"sprain" in the noun sense
a painful injury to a joint caused by a sudden wrenching of its ligaments
"sprain" in the verb sense
1. twist, sprain, wrench, turn, wrick, rick
twist suddenly so as to sprain
"wrench one's ankle"
"The wrestler twisted his shoulder"
"the hikers sprained their ankles when they fell"
"I turned my ankle and couldn't walk for several days"
Source: WordNet® (An amazing lexical database of English)
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