←
Proto-Germanic *armaz (inherited)
←
Middle High German arm (inherited)
←
Proto-West Germanic *arm (inherited)
←
Old High German arm (inherited)
←
Proto-Indo-European *h₂ermos (inherited)
←
Proto-Indo-European *h₂ŕ̥mos (mention)
←
Proto-Indo-European *h₂er- (mention)
→
Old English earm (cognate)
→
Alemannic German Aare (cognate)
→
Pennsylvania German Aarm (cognate)
→
Saterland Frisian Íerm (cognate)