Thresh
Part of speech: verb
Definition: To separate the grain from the straw or husks by mechanical beating, with a flail or machinery. To beat soundly, usually with some tool such as a stick or whip; to drub.
Thrash
Part of speech: verb
Definition: To beat mercilessly.To defeat utterly.To thresh.To extensively test a software system, giving a program various inputs and observing the behavior and outputs that result.In computer architecture, to cause poor performance of a virtual memory (or paging) system.
Part of speech: noun
Definition: A beat or blow; the sound of beating.A particularly aggressive and intense form of heavy metal music with a focus on speed, technical precision, and alternate picking.