French sain

← Old French sain (inherited)

← Proto-Indo-European *swā-n- (derived)

← Latin sānus (inherited)

→ English sainfoin (mention)

→ Esperanto sana (cognate)

→ French malsain (compound)

→ French sainfoin (mention)

→ French saindoux (affix)

→ French assainir (confix)