Where does “fasten” come from?

fasten (Middle English) comes from Old English fæstan, from Proto-Germanic fastijaną, from Proto-Germanic fastuz — fixed, firm, secure.

Ancestry of “fasten”, step by step

StepLanguageWordMeaning
1Old Englishfæstanto fast
2Proto-Germanicfastijanąto fasten
3Proto-Germanicfastuzfixed, firm, secure
Every word from Proto-Germanic fastuz →Every word from Proto-Germanic fastijaną →Every word from Old English fæstan →
fasten — Etymology, Origin & Word History | Etymology Explorer