English

featherdown

From feather + down.

A compound of feather + down

Proto-Indo-European *peth₂- ‘to fly’

…

Proto-Germanic *feþrō

Proto-West Germanic *feþru

Old English feþer

Middle English fethere ‘a wing feather’

Old English dūne ‘down’

Middle English doun

English down

Today it means

noun Down (soft, fluffy immature feathers used in bedding).

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

Etymograph / featherdown