δύσφευκτος
From LSJ
προγράψαντες οὖν τά τε θεωρήματα καὶ τὰ ἐπιτάγματα τὰ χρεῖαν ἔχοντα εἰς τὰς ἀποδείξιας αὐτῶν μετὰ ταῦτα γραψοῦμές τοι τὰ προκείμενα → having therefore written at the beginning the theorems and the postulates that are necessary for their proofs, we will then write out for you the propositions
English (LSJ)
ον,
A hard to be avoided, κακόν Men. Georg.12, cf. Ph.2.268.
Greek (Liddell-Scott)
δύσφευκτος: -ον, ὃν δύσκολον εἶνε νὰ ἀποφύγῃ τις, Φίλων 2. 268.