נָאַף (b. h.) to be unchaste, voluptuous, esp. to have illicit intercourse; to commit adultery. Lev. R. s. 23 (ref. to Job XXIV, 15) [read:] שלא תאמר שכל מי שהוא נוֹאֵף בגופו נקרא נוֹאֵף אפי׳ נוֹאֵף בעיניו נקרא נוֹאֵף do not say, he only who is unchaste with his body is called a noëf, but even he who is unchaste with his eye &c.; Pesik. R. s. 24 (corr. acc.); a. fr.—Esp. נוֹאֵף adulterer, paramour; f. נוֹאֶפֶת adulteress. Ib. Num. R. s. 9; Tanḥ. Naso 4; a. fr.
Pi. - נִיאֵף same. Pes. 113ᵇ זקן מְנָאֵף a lewd old man. Nidd. 13ᵇ המְנָאֲפִים ביד who commit masturbation. Ex. R. s. 31, end, a. e. (prov.) מְנָאֶפֶת בתפוחים וכ׳ she prostitutes herself for apples and distributes them among the sick, v. גּוּף I ch.—Sot. IX, 9 משרבו המְנָאֲפִים וכ׳ when the lewd men became numerous, the proceedings against the faithless woman (סוֹטָה) were abolished. Shebu. 47ᵇ עוקב אחר מנאף Ms. M. a. Rashi (ed. נואף) he who follows up the voluptuous (to procure prostitutes for him); a. fr.—(Ḥull. 63ᵃ, v. אָנַף.]
Hif. - הִנְאִיף to cause illicit intercourse; to bawd. Shebu. l. c. ת"ל לא תנאף לא תַנְאִיף (Ms. M. only לא תנאף) it says (Ex. XX, 14) ‘thou shalt not be lewd’, (which implies) thou shalt not assist lewdness.