←
Old English ærs (inherited)
←
Old English ears (mention)
←
Middle English arce (alter)
←
Middle English ers (alter)
←
Middle English eres (alter)
←
Middle English hars (alter)
←
Middle English hers (alter)
←
Middle English aars (alter)
←
Old French arz (borrowed)
←
Old French artz (mention)
←
Old French art (mention)
←
Proto-Germanic *arsaz (inherited)
←
Proto-West Germanic *ars (inherited)
←
Proto-Indo-European *h₃érsos (inherited)
→
English ass (inherited)
→
English arse (inherited)