←
Old French -ier (derived)
←
Proto-Germanic *-ingō (inherited)
←
Proto-Germanic *-ungō (mention)
←
Middle High German -ieren (derived)
←
Proto-Indo-European *h₂epó (derived)
←
Proto-Indo-European *h₃er- (derived)
←
Proto-Italic *ab (derived)
←
Proto-Italic *orjōr (derived)
←
Norwegian Bokmål -ing (affix)
←
Old Norse -era (inherited)
←
Old Norse -ingr (inherited)
←
Old Norse -ingi (mention)
←
Old Norse -ing (mention)