He shall take a wife in her virginity - בתוליה bethuleyha. This is a full proof that בתולה bethulah is the proper Hebrew term for a virgin; from the emphatic root בתל bathal, to separate; because such a person was in her separate state, and had never been in any way united to man.

Leviticus 21:15 so that he will not profane his offspring among his people; for I am the LORD who sanctifies him.'"

Leviticus 21:17 "Speak to Aaron, saying, 'No man of your offspring throughout their generations who has a defect shall approach to offer the food of his God.

The Section Chap. I. -iii.
The question which here above all engages our attention, and requires to be answered, is this: Whether that which is reported in these chapters did, or did not, actually and outwardly take place. The history of the inquiries connected with this question is found most fully in Marckius's "Diatribe de uxore fornicationum," Leyden, 1696, reprinted in the Commentary on the Minor Prophets by the same author. The various views may be divided into three classes. 1. It is maintained by very many interpreters, …
Ernst Wilhelm Hengstenberg—Christology of the Old Testament