Etymograph

English

foamboard

From foam + board.

A compound of foam + board

Proto-Indo-European *(s)poH(y)-

…

Proto-Germanic *faimaz

Proto-West Germanic *faim ‘foam, froth’

Old English fām

Middle English fom

English foam

Proto-Germanic *burdą ‘board’

Proto-West Germanic *bord ‘board’

Old English bord ‘board’

Middle English boord

English board

Today it means

noun A strong, lightweight material consisting of an inner layer of polystyrene clad with outer facing of either white clay-coated paper or brown kraft paper.

Language periods are conventional ranges, not dates for this word.

Etymograph / foamboard