Titus 2:8

ἀκατάγνωστον : to which no exception can be taken. See Deissmann, Bible Studies, Trans. p. 200. ὑγιῆ implies the conformity of the doctrine taught with the Church's standard (see note on 1 Timothy 1:10), while ἀκατάγνωστον has reference to the manner of its presentation to the hearer.

ὁ ἐξ ἐναντίας : The heathen opponent, official or unofficial, ὁ ἀντικείμενος (1 Timothy 5:14), οἱ ἀντιδιατιθέμενοι (2 Timothy 2:25), not the Devil himself (Chrys.).

ἐντραπῇ : vercatur (Vulg.); but confundatur, as in 2 Thessalonians 3:14, would be a better rendering here. An antagonist who finds that he has no case “looks foolish,” as we say.

φαῦλον : usually applied to actions. See reff. The clause means having nothing evil to report concerning us : not, as the English versions, having no evil thing to say, which might be explained as, “being unable to abuse us”.