accustom (v) – to get used to (something)
accustomed (adj) – usual, in the habit of, commonly used
1. She finally became accustomed to her new apartment after a month.
2. He had grown accustomed to his work.
3. The teacher’s accustomed kindness made her students love her.
accustom (v) is often followed by “to“… i.e. “accustomed to“