The story
- Proto-West Germanic · inherited from*fastinōn“to secure, fasten”
- Old English · inherited fromfæstnian
- Middle English · inherited fromfastenen
- English todayfasten
From Middle English fastenen, from Old English fæstnian, from Proto-West Germanic *fastinōn (“to secure, fasten”). Equivalent to fast + -en.
Etymology from Wiktionary, CC BY-SA 4.0.