English rostrum

← Proto-Indo-European *reh₁d- (root)

← Proto-Indo-European *reh₁d- (derived)

← Proto-Indo-European *-trom (mention)

← Latin rōstrum (borrowed)

← Latin rōdō (mention)

← Latin -trum (mention)

→ English longirostrine (confix)

→ English rostroid (suffix)

→ Ido rostro (borrowed)