Swedish etter

← Proto-Germanic *aitrą (inherited)

← Proto-Indo-European *h₂oyd- (inherited)

← Proto-Indo-European *h₂eyd- (mention)

← Old Norse eitr (inherited)

→ English atter (cognate)

→ Old English ator (cognate)

→ German Eiter (cognate)

→ Swedish ettrig (affix)

→ Vilamovian ǡter (cognate)