m., or sann-leiki, a, m.; in nom. and gen. the strong form prevails, in dat. and acc. the weak; thus in the Icel. N. T., the received text of 1644:

α. weak form, nom. sannleiki, 2 Cor. vii. 14; gen. sannleika, sannleikans, John i. 14, Rom. ii. 20, xv. 8, 1 Cor. v. 8, 2 Cor. iv. 2, 1 Pet. i. 22, 1 John v. 6, 2 John 2: dat. and acc. sannleika, sannleikann, sannleikanum, John v. 33, viii. 32, 40, 44, 45, xvii. 19, xviii. 37, Rom. i. 18, 25, ii. 8, 2 Cor. xiii. 8, Gal. iii. 1, iv. 16, Ephes. iv. 15, 2 Thess. ii. 12, 1 Tim. ii. 7, 2 Tim. ii. 18, 25, James iii. 14, v. 19, 1 John ii. 21, 2 John 1, 3 John 3; í sannleika, Mark xii 32, N. T. passim.

β. strong decl., nom. sannleikr, samileikrinn. John i. 17, viii. 32, xiv. 6, Rom. iii. 7, 2 Cor. vii. 14, xi. 10, Gal. ii. 5, Ephes. v. 9, 1 John i. 8, ii. 4: gen. sannleiks, sannleiksins, John xvi. 13, 2 Thess. ii. 10, 13, 1 Tim. ii. 4, iii. 15, Tit. i. 1, Hebr. x. 26, 1 Pet. i. 22, 2 Pet. ii. 2, 1 John iv. 6, 3 John 8: acc. sannleik, sannleikinn, Rom. ix. 1, 1 Tim. ii. 7, John viii. 32, 46, xvi. 7, 2 Cor. xii. 6, Gal. ii. 14, 2 Tim. ii. 25, 1 John i. 6, ii. 21, 2 John 1: dat. sannleik, sannleiknum, 1 Tim. vi. 5, 2 Tim. iii. 8, iv. 4, Tit. i. 14, 1 John iii. 19, 3 John 3.

B. Truth; sannleikrinn, Edda (pref.); Guð er sannleikr, K. Á. 200; taka fyrir sannleik, Fms. ix. 424: í sannleika, in truth, Rb. 362: the saying, sannleikanum verðr hverr sárreiðastr; sannleiks-gata, -ást, -elska, -hatr, H. E. i. 510, Al. 106, Stj., Vídal.