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English definition of “flail”

flail

verb [I or T] uk   /fleɪl/ (also flail about/around) us  
(especially of arms and legs) to move energetically in an uncontrolled way: A wasp came towards us and Howard started flailing his arms around. She ran from the house in a terrible rage, her arms flailing in the air.

flail

noun [C] uk   /fleɪl/ us  
a tool consisting of a rod that hangs from a long handle, used especially in the past for threshing grain
(Definition of flail from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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