undermine
From LSJ
Ἀναξαγόρας δύο ἔλεγε διδασκαλίας εἶναι θανάτου, τόν τε πρὸ τοῦ γενέσθαι χρόνον καὶ τὸν ὕπνον → Anaxagoras used to say that we have two teachers for death: the time before we were born and sleep | Anaxagoras said that there are two rehearsals for death: the time before being born and sleep
English > Greek (Woodhouse)
v. trans.
Ar. and P. διορύσσειν, P. and V. κατασκάπτειν, συγκατασκάπτειν.
He undermines and prises open the door: V. σκάπτει μοχλεύει θύρετρα (Eur., H. F. 999).
Met., P. διορύσσειν, Ar. and V. ὑπέρχεσθαι.
Our position has been undermined in our several cities: P. διορωρύγμεθα κατὰ πόλεις(Dem. 118).