An Etymological Dictionary of the German Language/Annotated/falten

by Friedrich Kluge

falten, verb. ‘to fold, plait, knit (the brow),’ from the equivalent Middle High German valten, Old High German faltan, faldan; corresponds to Goth falþan, Old Icelandic falda, Anglo-Saxon fealdan, English to fold; the Teutonic root is falþ, ‘to fold,’ pre-Teutonic plt, with which compare Old Slovenian pletą. plesti, ‘to twist,’ Greek διπλάσιος, ‘twofold’ (see under -falt), Sanscrit puṭa, ‘fold,’ for plta.