ὑπονέμομαι
From LSJ
κακοὶ μάρτυρες ἀνθρώποισιν ὀφθαλμοὶ καὶ ὦτα βαρβάρους ψυχὰς ἐχόντων → eyes and ears are poor witnesses for men if their souls do not understand the language (Heraclitus Phil.: Fr. B 107; Testimonia: Fragment 16, line 6)
English (LSJ)
Med.,
A eat away beneath or secretly, ἔλαθεν πῦρ ὑπονειμάμενον AP7.444 (Theaet.); but ὑπονεμησαμένη, though found in codd. in Hp.Oss.18, is f. l. for ὑπονης αμένη, v. ὑπονέω. II undermine (cf. ὑπόνομος): metaph., deceive, γυναῖκας Epich.9.