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flail

/fleɪl/ · flay·l
noun
  1. A tool used for threshing, consisting of a long handle with a shorter stick attached with a short piece of chain, thong or similar material. The farmer used a flail to separate the wheat from the chaff.
  2. A weapon which has the (usually spherical) striking part attached to the handle with a flexible joint such as a chain. The knight wielded a flail in battle, its chain whirling as he swung it.
verb
  1. To beat using a flail or similar implement. The farmer flailed the wheat to separate the grain from the stalks.
  2. To wave or swing vigorously. She flailed her arms to get the attention of the lifeguard.
  3. To thresh. The machine flailed the grain, separating it from the chaff.

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Did you know? The word 'flail' is often associated with the medieval flail, a weapon used by knights in battle, which was also used for threshing grain in peacetime.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Aug 4, 2026