What is the masculine form of witch and its sentence?

In English there are no masculine or feminine forms. English uses gender specific nouns for a male or a female.

The noun witch is a common gender noun, a Word for a male or a female.

A noun functions in a sentence as the subject of a sentence or a clause, and as the object of a verb or a preposition.

Note: The Word "warlock" (also is a common gender noun), commonly used in fiction and fantasy works, is an extremely derogatory Word. The original meaning of the Word "warlock" was "oath breaker" or "one who has broken their oath with God". It is from the middle ages and referred to anyone male or female who practiced any form of paganism. At the time the Catholic church was on a mission to eradicate paganism, and in their attempts they demonized the gods of paganism and claimed the practitioners had "made a pact with the devil", hence the "oath breaker" term.