τὸ κοῖλον
From LSJ
Λαβὼν ἀπόδος, ἄνθρωπε, καὶ λήψῃ πάλιν → Capias ut iterum, redde, quod iam ceperis → Du nimmst; gib, Mensch, zurück, damit du wieder nimmst
Greek > English (Woodhouse)
depression between hills, hollow of anything, of the coast-line, the hollow part of anything