fifty

The story

1. Proto-Germanic · inherited from*fimf tigiwiz“five tens”
2. Old English · inherited fromfīftiġ
3. Middle English · inherited fromfifty
4. English todayfifty

PIE word *pénkʷe Etymology tree Proto-Indo-European *pénkʷe Proto-Germanic *fimf Proto-Indo-European *déḱm̥ Proto-Indo-European *-t Proto-Indo-European *déḱm̥-t(-s) Proto-Germanic *tegun(dz) Proto-Germanic *tigiwiz Proto-Germanic *fimf tigiwiz Old English fīftiġ Middle English fifty English fifty From Middle English fifty, from Old English fīftiġ, from Proto-Germanic *fimf tigiwiz (“five tens”). By surface analysis, five + -ty.