κοίλασμα
From LSJ
συνερκτικός γάρ ἐστι καὶ περαντικός, καὶ γνωμοτυπικὸς καὶ σαφὴς καὶ κρουστικός, καταληπτικός τ' ἄριστα τοῦ θορυβητικοῦ → he's intimidative, penetrative, aphoristically originative, clear and aggressive, and superlatively terminative of the obstreperative
English (LSJ)
ατος, τό,
A hollow, LXX Is.8.14; groove, Apollod.Poliorc.182.7, Ath.Mech.36.6; interior of a lamp, Hero Spir.2.22.
German (Pape)
[Seite 1466] τό, das Ausgehöhlte, die Höhlung, Sp.