wurde

Formed by analogy with the plural wurden, from Middle High German wurden (singular wart). The verbs of this class normally generalise the singular vowel; as in sterben etc. we should thus expect werden, ward, warden, geworden. These forms are attested, but the plural usually retained its -u- and this in turn tended to be generalised to the singular. A possible reason is the a-forms’ phonetic similarity to war, waren. The final -e in wurde is unetymological; it goes back to a development in Early