fold (v.) Look up fold at Dictionary.com
O.E. faldan (Mercian), fealdan (W.Saxon), "to bend cloth back over itself," class VII strong verb (past tense feold, pp. fealden), from P.Gmc. *falthanan (cf. O.N. falda, M.L.G. volden, Ger. falten, Goth. falžan), from PIE *pel-to- (cf. Skt. putah "fold, pocket," Alb. pale "fold," M.Ir. alt "a joint"), from base *pel- "to fold." The weak form developed from 15c. Sense of "to yield to pressure" is from late 14c. The noun meaning "a bend or ply in anything" is mid-13c., from the verb. Folder "folding cover for loose papers," is first recorded 1911.
fold (n.) Look up fold at Dictionary.com
"pen or enclosure for sheep or other domestic animals," O.E. falęd, falud, a Gmc. word (cf. E.Fris. folt "enclosure, dunghill," Dan. fold "pen for sheep"), of uncertain origin.