ACCUSTOM TO is a verb phrase that means to become accustomed or used to something. INURE, ENURE, and HABITUATE are all related terms that mean to become accustomed to something through experience or repetition. INURE is a five-letter word meaning to become hardened to something unpleasant. ENURE is also a five-letter word meaning to become accustomed to something through habit or custom. HABITUATE is a nine-letter word meaning to become accustomed to something through frequent repetition or exposure. All of these terms refer to the process of becoming accustomed to something, either through habit or experience.