←
Proto-Germanic *-iskaz (inherited)
←
Proto-Indo-European *swer- (root)
←
Proto-Indo-European *h₂epó (derived)
←
Proto-Indo-European *swer- (derived)
←
Proto-Indo-European *-iskos (inherited)
←
Proto-Italic *ab (derived)
←
Norwegian Bokmål -isk (suffix)
←
Norwegian Bokmål absurd (mention)
←
Old Norse -iskr (inherited)