Akademik

thresh
v.
1 tr. beat out or separate grain from (corn etc.).
2 intr. = THRASH v. 4.
3 tr. (foll. by over) analyse (a problem etc.) in search of a solution.
Phrases and idioms:
threshing-floor a hard level floor for threshing esp. with flails. threshing-machine a power-driven machine for separating the grain from the straw or husk. thresh out = thrash out.
Etymology: var. of THRASH

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thresh, v.
the earlier and etymological form of the vb. now also written thrash, q.v.; still frequent in the sense of beating out corn; so thresh n., threshing, etc.: see thrash, etc.

Useful english dictionary. 2012.