Feder
... in German appears similar to the English feather (externer Link)
The German word feather can mean different things in English. It may be a horny part of a bird. But it also translates as a spring or coil as in technical appliances.
This similarity may or may not have a sound etymological reason. It is noted here as a mere curiosity. You can find a full list under Englisch-Deutsch => lex ↗