←
Old English otor (inherited)
←
Middle English oter (inherited)
←
Middle English otir (mention)
←
Middle English otur (mention)
←
Middle English otyre (mention)
←
Proto-Germanic *utraz (inherited)
←
Proto-West Germanic *ot(t)r (inherited)
←
Ancient Greek ὕδρα (cognate)
←
Proto-Indo-European *wed- (root)
←
Proto-Indo-European *udrós (inherited)
←
Proto-Indo-European *wed- (derived)
←
Icelandic otur (cognate)
←
Norwegian oter (cognate)
←
Sanskrit उद्र (cognate)
←
Saterland Frisian Otter (cognate)
←
Swedish utter (cognate)
→
Ancient Greek ὕδρος (cognate)
→
Ancient Greek ὕδρα (cognate)
→
Norwegian Nynorsk oter (cognate)
→
Sanskrit उद्र (cognate)