From Longman Dictionary of Contemporary Englishthreshthresh /θreʃ/ verb [intransitive, transitive] TAto separate grains of corn, wheat etc from the rest of the plant by beating it with a special tool or machine —thresher noun [countable]→ See Verb table
Examples from the Corpus
thresh• It is then wise to thresh as soon as possible to avoid loss to rats and mice.• He refused to help with the threshing because he thought the fork handle would stiffen his fingers.• He worked as a waterman with a threshing crew.• New inventions like the steam plow threshing machine, and reaper led to significant farm workforce reductions.• Women do most of the crop farming, weeding, harvesting, threshing, storing crops and selling.• Thrice happy Duck, employ'd in threshing Stubble!• He kept making desperate swimming movements, feebly threshing the water trying to pull himself free.• Still entwined, the puppets threshed violently against each other as if overcome with concupiscence.Origin thresh Old English threscan 