Irish sine

← Proto-Celtic *sɸenyos (inherited)

← English spean (cognate)

← Irish sine siain (link)

← Proto-Indo-European *pstḗn (derived)

← Old Norse speni (cognate)

← Old Irish [[sine]], [[siniu]] (inherited)

← Old Irish sen (mention)

← Old Irish sine (inherited)

→ Sanskrit स्तन (cognate)