unaccustomed

US /ˌʌn.əˈkʌs.təmd/
UK /ˌʌn.əˈkʌs.təmd/
"unaccustomed" picture
1.

not familiar or usual; out of the ordinary

:
He felt an unaccustomed sense of peace.
It was an unaccustomed sight to see him so quiet.
2.

not used to something; not in the habit of

:
She was unaccustomed to such luxury.
He found himself unaccustomed to the cold weather.