unaccustomed

adjective2

1. •
   Not used to an event or thing, not accustomed.

   • He is unaccustomed to the cold.
2. •
   To which one is not accustomed, unfamiliar

   • He stood transfixed before the unaccustomed view of London at night time, a vast panorama which reminded him […] of some wood engravings far off and magical, in a printshop in his childhood. — 1963