A.unerring, infallible, γέρων ἅλιος ν., of Proteus, Od.4.349, etc.; ν. τε καὶ ἤπιος, of Nereus, Hes.Th.235; εἰπεῖν ν. βουλήν a sure decree, i.e. one that will infallibly be put in force, Od.1.86,5.30; νημερτέα εἰπεῖν or μυθήσασθαι to speak sure truths, 3.19, Il.6.376; “ἦ μάλα τοῦτο ἔπος ν. ἔειπες” 3.204; πάντα ναμερτῆ λόγον A.l.c. (troch.); μῦθος, βάξις, A.R.4.810, 1184: Sup. “-έστατος” Lyc.223: more freq. as Adv., “νημερτὲς ἐνίσπες” Od.22.166; “τῶν γε νόον ν. ἀνέγνω” 21.205; “νημερτὲς ὑπόσχεο” Il.1.514: Ion. Adv. νημερτέως as trisyll., Od.5.98.
νημερτ-ής , ές, Dor. να_μερτής (the only form used by Trag., A. Pers.246), (νη-, ἁμαρτάνω)