←
Old English sidu (cognate)
←
Faroese siður (cognate)
←
Proto-Germanic *siduz (inherited)
←
Old High German situ (cognate)
←
Ancient Greek ἦθος (cognate)
←
Proto-Indo-European *swe-dh- (derived)
←
Old Norse siðr (inherited)
→
Luxembourgish Sitt (cognate)