ὑπ-ορύσσω · hyp-oryssō — LSJ
dig under, undermine, τὸ τεῖχος, τὰ τείχεα, Hdt. 5.115, 6.18, PRyl. 127.11 (i A. D.); μέρος τοῦ ἐξαγωγοῦ PTeb. 13.10 (ii B. C.); τὸ σταθμόν, of burglars, ib. 804.12 (ii B. C.); σύριγγα Polyaen. 6.17: abs., Ath.Mech. 20.3: metaph., τὰς κοινὰς διαλύσεις ὑ. Plu. Ages. 35; τὰ τῆς διαίτης Luc. Merc.Cond. 31; ὑ. τῶν ἀπορρήτων ἔνια find them out, Plu. Frat. 2.490c.