כָּשַׁף
From LSJ
οὕτως καὶ ἡ πίστις, ἐὰν μὴ ἔχῃ ἔργα, νεκρά ἐστιν καθ' ἑαυτήν → so even the Faith, if it does not have deeds, and is on its own, is dead | the Faith without works is dead
English (Strong)
a primitive root; properly, to whisper a spell, i.e. to inchant or practise magic: sorcerer, (use) witch(-craft).