un- + accustomed
unaccustomed (comparative more unaccustomed, superlative most unaccustomed)
- Not prepared by life experience to an event or thing, not accustomed.
1963, Margery Allingham, “Foreword”, in The China Governess:
- 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.
- He is unaccustomed to the cold.