FROTH

I. noun (plural ~s) Etymology: Middle English, from Old Norse ~a; akin to Old English āfrēothan to ~ Date: 14th century 1. bubbles formed in or on a liquid ; foam , a foamy slaver sometimes accompanying disease or exhaustion, something resembling ~ (as in being unsubstantial, worthless, or light and airy), II. verb Date: 14th century intransitive verb to foam at the mouth, to throw ~ out or up, to become covered with or as if with ~ , transitive verb to cause to foam, to cover with ~, vent , voice