The story
- Proto-Indo-European · derived from*-poltos“-fold”
- Proto-Germanic · inherited from*-falþaz“-fold”
- Proto-West Germanic · inherited from*-falþ
- Old English · inherited from-feald“-fold”
- Middle English · inherited from-fold
- English today-fold
From Middle English -fold, -fald, -fauld, from Old English -feald (“-fold”), from Proto-West Germanic *-falþ, from Proto-Germanic *-falþaz (“-fold”), from Proto-Indo-European *-poltos (“-fold”), from *pel- (“to fold”). Cognate with Dutch -voud, Swedish -faldig (“-fold”), Latin -plus, -plex, Ancient Greek -παλτος (-paltos), -πλος (-plos), -πλόος (-plóos). More at fold.
Etymology from Wiktionary, CC BY-SA 4.0.