The story
- Proto-Indo-European · inherited from*(s)poHy-m-os
- Proto-Germanic · inherited from*faimaz
- Proto-West Germanic · inherited from*faim
- Old English · inherited fromfām
- Middle English · inherited fromfom
- English todayfoam
From 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 4.0.