The story
- Proto-Germanic · derived from*witaną“to wit, know”
- Proto-Germanic · inherited from*waist
- Old English · inherited fromwāst
- Middle English · inherited fromwost
- English todaywost
From Middle English wost, from Old English wāst (also wǣst), from Proto-Germanic *waist, second person singular indicative of Proto-Germanic *witaną (“to wit, know”). More at English wit.
Words from the same roots
Etymology from Wiktionary, CC BY-SA 4.0.