οὐκ ἔστι σιγᾶν αἰσχρόν, ἀλλ' εἰκῆ λαλεῖν → keeping silence is not shameful; speaking at random is (Menander)
πλεύρωμα, πλάγιον, βόαξ, βῶξ, κοῖλον, λαγών, πλευρά, πλευρή, τοῖχος, ἐπιφάνεια