Yahweh is a name for God used in the Hebrew Bible. It is considered a sacred and powerful name, often translated as "the Lord" or "I am who I am." Jews traditionally do not speak this name out loud, instead using substitutes like Adonai. In Christian theology, Yahweh is seen as the creator and ruler of the universe, the one true God. The name Yahweh is often associated with qualities such as love, justice, and mercy.