certainty
From LSJ
νοεῖν γάρ ἐστι κρεῖττον καὶ σιγὴν ἔχειν → it's better, you see, to understand and yet say nothing (Menander)
νοεῖν γάρ ἐστι κρεῖττον καὶ σιγὴν ἔχειν → it's better, you see, to understand and yet say nothing (Menander)
assurance: P. βεβαιότης, ἡ, ἀσφάλεια, ἡ.
truth: P. and V. ἀλήθεια, ἡ, Ar. and P. ὀρθότης, ἡ, V. ναμέρτεια, ἡ.
distinctness: P. and V. σαφήνεια, ἡ.