διακωλυτέον
From LSJ
Λεύσσετε, Θήβης οἱ κοιρανίδαι τὴν βασιλειδᾶν μούνην λοιπήν, οἷα πρὸς οἵων ἀνδρῶν πάσχω → See, you leaders of Thebes, what sorts of things I, its last princess, suffer at the hands of such men
English (LSJ)
A one must prevent, Pl.R.401b, Agath.2.6.
Greek (Liddell-Scott)
διακωλῡτέον: ῥημ. ἐπίθ., πρέπει τις νὰ ἐμποδίσῃ, Πλάτ. Πολ. 401Β.
