Thresh
131thrash — 1580s, to separate grains from wheat, etc., by beating, dialectal variant of threshen (see THRESH (Cf. thresh)). Sense of beat (someone) with (or as if with) a flail is first recorded c.1600. Meaning to make wild movements like those of a flail… …
132thresher — late 14c., agent noun from THRESH (Cf. thresh). The thresher shark (c.1600) so called for its long upper tail shape, which resembles a threshing tool …
