Meaning

noun a mass of small bubbles formed in or on a liquid

noun a lightweight material in cellular form; made by introducing gas bubbles during manufacture

verb become bubbly or frothy or foaming

originFrom Middle English fom, foom, from Old English fām, from Proto-West Germanic *faim, from Proto-Germanic *faimaz, from Proto-Indo-European *(s)poHy-m-os, from *(s)poH(y)- (“foam”). Cognate with German Feim (“foam”), Latin spūma (“foam”), Latin pūmex (“pumice”), Sanskrit फेन (phéna, “foam”), possibly Northern Kurdish fê (“epilepsy”).

Etymology from Wiktionary, CC BY-SA 3.0