whelm

Etymology

Comes from Middle English whelmen (“to turn over, capsize; to invert, turn upside down”), perhaps from Old English *hwealmnian, a variant of *hwealfnian, from hwealf (“arched, concave, vaulted; an arched or vaulted ceiling”), from Proto-West Germanic *hwalb, from Proto-Germanic *hwalbą (“arch, vault”), from Proto-Indo-European *kʷelp- (“to curve”). It is cognate with Dutch welven (“to arch”), Old Saxon bihwelvian (“to cover, hide”), German wölben (“to bend, curve, arch”), Icelandic hvelfa (“to overturn”), German Walm (“a vaulted roof”), Icelandic hvolf (“vaulted ceiling”), and Ancient Greek κόλπος (kólpos, “bosom, hollow, gulf”). The noun comes from the verb.