כָּשַׁף (b. h.; cmp. חָשַׁב) [to whisper, v. Fl. to Levy Talm. Dict. II, p. 459,] to think, devise, v. כּוּשְׁפָּא.
Pi. - כִּישֵּׁף to charm, practice sorcery (cmp. לָחַשׁ). Snh. 43ᵃ (suppressed in later eds., v. יֵשׁוּ) על שכי׳ והסית וכ׳ because he practiced sorcery and enticed &c. Ib. VII, 4 המְכַשֵּׁף he who practices witchcraft, expl. ib. 11 המכ׳ העושה מעשה וכ׳ he who produces a real effect is guilty, not he who produces an optical delusion, v. אָחַז; a. fr.—V. מְכַשֵּׁף. מְכַשֵּׁפָה.