←
West Frisian iepen (mention)
←
Proto-Germanic *upanaz (inherited)
←
Old Swedish ypin (inherited)
←
Old Swedish øppin (mention)
←
Icelandic opinn (mention)
←
Low German apen (mention)
←
Low German open (mention)
←
Norwegian Nynorsk open (mention)
←
Old Norse opinn (inherited)
→
Old English open (cognate)
→
Westrobothnian yppe (cognate)
→
Icelandic opinn (mention)
→
Norwegian Bokmål åpen (cognate)
→
Norwegian Nynorsk open (cognate)