Definition of mishappen in English:

mishappen

Pronunciation /ˌmɪsˈhap(ə)n/

verb

rare
  • Of an event, impersonal, or with non-referential it as subject: to happen unfortunately (originally with dative of person affected); to occur by misfortune, to miscarry.

Origin

Middle English (in an earlier sense). Originally from mishap + -en.