σιαγόνιον
From LSJ
τέχνη δὲ ἄνευ ἀλκῆς οὐδὲν ὠφελεῖ (Thucydides 2.87.4.6) → η τέχνη απαιτεί κουράγιο, skill without heart is useless
English (LSJ)
Ion. σῐηγ-, τό, in pl.,
A the parts under or near-the jaw, Hp.Morb.2.26, LXXDe.18.3. II cheek-piece, side-piece, in military engines, Ath.Mech.35.5, Apollod.Poliorc.183.3, 188.4.