ἀμφίκοιλος
From LSJ
ἄνθρωπος ὢν ἥμαρτον· οὐ θαυμαστέον → being human I made a mistake; there is nothing remarkable about it
English (LSJ)
ον,
A hollowed on both sides, Suid. II doubly concave, of a curvilinear angle, Procl.in Euc.Def.8p.127F., al.
German (Pape)
[Seite 140] rings ausgehöhlt, τό, eine Trage, Suid.
Greek (Liddell-Scott)
ἀμφίκοιλος: -ον, ὁ πανταχόθεν κοῖλος, ὁ ὅλως κοῖλος, Σουΐδ.