Noun

• S: (n) flail (an implement consisting of handle with a free swinging stick at the end; used in manual threshing)

Verb

• S: (v) thrash, thresh, lam, flail (give a thrashing to; beat hard)
• S: (v) flail, thresh (move like a flail; thresh about) "Her arms were flailing"
• direct hypernym / inherited hypernym / sister term
• S: (v) beat, flap (move with a flapping motion) "The bird's wings were flapping"
• S: (v) move (move so as to change position, perform a nontranslational motion) "He moved his hand slightly to the right"
• sentence frame
• Something ----s
• Something is ----ing PP