Meaning

noun a puddle where animals go to wallow

noun an indolent or clumsy rolling about

verb devote oneself entirely to something; indulge in to an immoderate degree, usually with pleasure

originFrom Middle English walowen, walewen, walwen, welwen, from Old English wealwian (“to roll”), from Proto-West Germanic *walwōn, variant of *walwijan, from Proto-Germanic *walwijaną (“to roll”), from Proto-Indo-European *welw-, from Proto-Indo-European *welH- (“to turn, wind, roll”). Cognate with Latin volvō (“roll, tumble”, verb).

Etymology from Wiktionary, CC BY-SA 3.0