←
Old English teors (inherited)
←
Middle English tarse (inherited)
←
Middle English tearse (mention)
←
Middle English terce (mention)
←
Middle English ters (mention)
←
French tarse (borrowed)
←
Proto-Germanic *tersaz (inherited)
←
Proto-Indo-European *deres- (derived)
←
Proto-Indo-European *der- (mention)
→
English penis (mention)