The sages of the Talmud taught that the yetzer hara, the evil inclination within every human being, goes by seven different names in Scripture. Each prophet saw a different face of it, and called it by the name that matched what he saw.
The Holy One, blessed be He, calls it evil. At the end of the flood story, God says, "the inclination of man's heart is evil from his youth" (Genesis 8:21). That is the original diagnosis, issued by the only one who can see the whole disease.
Moses calls it uncircumcised. In Deuteronomy he commands, "circumcise therefore the foreskin of your heart" (Deuteronomy 10:16). Moses treats the evil inclination as something overgrown that must be cut back to expose what lies beneath.
David calls it unclean. His cry in Psalm 51 was, "Create in me a clean heart, O God" (Psalms 51:10). David, who knew his own capacity for sin, assumed that anything not actively cleansed is already defiled.
Solomon calls it enemy. In Proverbs he counsels, "if thine enemy be hungry, give him bread; if he be thirsty, give him water" (Proverbs 25:21–22). Rashi explains: the bread is Torah, the water is Torah. The way to disarm the inclination is to feed it study.
Isaiah calls it stumbling block (Isaiah 57:14). Ezekiel calls it stone. Each name is a strategy. To defeat something, you first have to know what to call it. The Talmud's catalogue in Sukkah (52a) gives seven handles for seizing the same slippery adversary.