Deny

de-ni': This word is characteristic of the New Testament rather than the Old Testament, although it translates three different Hebrew originals, namely, kachash, "to lie," "disown" (Ge 18:15; Jos 24:27; Job 8:18; 31:28; Pr 30:9); mana`, "to withhold," "keep back" (1Ki 20:7; Pr 30:7); shubh, "to turn back," "say no" (1Ki 2:16).

⇒See the definition of deny in the KJV Dictionary

In the New Testament, antilego, is once translated "deny," in the case of the Sadducees who denied the resurrection (Lu 20:27 the King James Version), and where it carries the sense of speaking against the doctrine. But the word commonly is arneomai, with or without the prefix ap-. In the absence of the prefix the sense is "to disown," but when it is added it means "to disown totally" or to the fullest extent. In the milder sense it is found in Mt 10:33; 26:70,72; of Simon Peter, Mr 14:68,70 (Ac 3:13-14; 2Ti 2:12-13; 2Pe 2:1; 1Jo 2:22-23; Jude 1:4; Re 2:13; 3:8). But it is significant that the sterner meaning is associated with Mt 16:24 and its parallels, where Christ calls upon him who would be His disciple to deny himself and take up his cross and follow Him.