Irish sín

← Proto-Celtic *sīnīti (inherited)

← Proto-Celtic *sīros (mention)

← Welsh hir (cognate)

← Old French signe (borrowed)

← Old French seing (mention)

← Irish séan (doublet)

← Irish sínigh (link)

← Gothic 𐍃𐌴𐌹𐌸𐌿𐍃 (cognate)

← Proto-Indo-European *seh₁- (inherited)

← Latin sērus (cognate)

← Latin signum (derived)

← Middle Irish sínid (inherited)

← Sanskrit साय (cognate)

← Old Irish sír (cognate)

→ Irish síneadh (affix)

→ Irish sínigh (affix)