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Old English fleax "cloth made with flax, linen," from Proto-Germanic *flakhsan (cf. Old Frisian flax, Middle Dutch and Dutch vlas, Old Saxon flas, Old High German flahs, German Flachs), probably from Proto-Germanic base *fleh-, corresponding to PIE *plek- "to weave, plait" (see ply (v.1)). But some connect it with PIE *pleik- (see flay) from the notion of "stripping" fiber to prepare it.
(Heb. pishtah, i.e., "peeled", in allusion to the fact that the stalks of flax when dried were first split or peeled before being steeped in water for the purpose of destroying the pulp). This plant was cultivated from earliest times. The flax of Egypt was destroyed by the plague of hail when it "was bolled", i.e., was forming pods for seed (Ex. 9:31). It was extensively cultivated both in Egypt and Palestine. Reference is made in Josh. 2:6 to the custom of drying flax-stalks by exposing them to the sun on the flat roofs of houses. It was much used in forming articles of clothing such as girdles, also cords and bands (Lev. 13:48, 52, 59; Deut. 22:11). (See LINEN.)