The verb "hacer" means "to do" or "to make" in Spanish. It is used to describe actions or processes, such as making a cake or doing homework. For example, you might say, "Voy a hacer la cena," which translates to "I am going to make dinner." On the other hand, "hacerse" is a reflexive verb that means "to become." It indicates a change in state or identity, often involving personal development or transformation. For instance, "Se hizo médico" means "He became a doctor." This highlights the difference between performing an action and undergoing a change.