Adaptation And Adjustment

adjective not familiar with or used to something; unfamiliar or unused to something

• She felt unaccustomed to the strict rules of the new workplace.
• I'm unaccustomed to waking up early on weekends.
• He was totally unaccustomed to the party scene.
• The sudden fame left her feeling unaccustomed to the attention.

adjective not accustomed or familiar with something

preposition indicating that someone is not accustomed to or familiar with something

• The new employee was unused to the strict dress code at the office.
• She was unused to waking up early for work.
• He was totally unused to the boss's sense of humor.
• The athlete was unused to losing games, but he took it as a learning experience.