ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
ἔλλειψις, ἐλλιπές, ἔνδεια, σπανιότης, δυσπόριστον, ἀφορία, μείωμα, ἀπουσία, σπάνιον, σπανία, σπάνις, ἀκρίβεια