undermine
From LSJ
English > Greek (Woodhouse)
verb transitive
Ar. and P. διορύσσειν, P. and V. κατασκάπτειν, συγκατασκάπτειν.
he undermines and prises open the door: V. σκάπτει μοχλεύει θύρετρα (Eur., Hercules Furens 999).
Met., P. διορύσσειν, Ar. and V. ὑπέρχεσθαι.
our position has been undermined in our several cities: P. διορωρύγμεθα κατὰ πόλεις(Dem. 118).