νικ-ητικός · nik-ētikos — LSJ
likely to conquer, conducing to victory, X. Mem. 3.4.11; ὑπόθεσις Plb. 24.9.4 (Comp.); ὅπλον ν. OGI 90.39 (Rosetta, ii B.C.); τὸ -ώτατον the most likely way to conquer, Plu. Comp. Phil.Flam. 2. Adv. -κῶς Eust. 1006.28.
Subst. νικητικόν, τό, charm for victory, esp. in horse-racing, PMag.Lond. 121.390, POxy. 1478.1 (iii/iv A.D.); ν. δικαστηρίων PMag.Osl. 1.35: pl., PMag.Leid. W. 8.29.