Lib definition

From Middle English libbe, from Old English lybb (“medicine, drug, potion, poison, charm"), from Proto-Germanic *lubjÄ… (“wort, herb, drug, poison"), from Proto-Indo-European *lewbÊ°-, *lewb- (“to peel, break, damage"), from Proto-Indo-European *lew- (“to cut, remove, prune, separate"). Cognate with German Luppe, Lüppe (“salve, ointment, plant juice, medicine, magic"), Icelandic lyf (“medicine, drug").

From Middle English libben, related to Dutch lubben (“to castrate, emasculate"), Dutch libbe (“a steer"), lubbert (“a eunuch"). Further relation uncertain. Possibly related to Old English *lybbian (“to doctor"), from lybb (see above); or perhaps related to Old English lappa, læppa (“lappet, piece, section, lobe, portion, district"). More at lop.