←
Old French -ier (derived)
←
Middle High German -ieren (derived)
←
Proto-Indo-European *lewh₃- (root)
←
Proto-Indo-European *h₂epó (derived)
←
Proto-Indo-European *s(w)ēd (derived)
←
Proto-Indo-European *swé (mention)
←
Proto-Indo-European *lewh₃- (derived)
←
Proto-Italic *ab (derived)
←
Norwegian Bokmål ere (suffix)
←
Old Norse -era (inherited)