Strong H2181 זָנָה zânâh · to fornicate

Genesis

1. Genesis 34:31
   And they said, Should he deal with our sister as with an harlot?
2. Genesis 38:15
   When Judah saw her, he thought her to be an harlot; because she had covered her face.
3. Genesis 38:24
   And it came to pass about three months after, that it was told Judah, saying, Tamar thy daughter in law hath played the harlot; and also, behold, she is with child by whoredom. And Judah said, Bring her forth, and let her be burnt.