From Longman Dictionary of Contemporary Englishunaccustomed to (doing) somethingunaccustomed to (doing) something formalUSED TO/ACCUSTOMED TOnot used to something a country boy, unaccustomed to city ways → unaccustomed
Examples from the Corpus
unaccustomed to (doing) something• Unemployed or still at school, often unaccustomed to budget discipline, young people now have unprecedented opportunities to outspend their means.• Human Resource departments are also unaccustomed to classifying employees according to these informal roles that are so vital to innovation.• Some of these visitors will be unaccustomed to country roads and to the hazards of walking along a road with no footpath.• Hazel, like nearly all wild animals, was unaccustomed to look up at the sky.• We became unaccustomed to silence, which was a signal for alarm.• They were people who were unaccustomed to silence, who were comforted by the racket of their own voices.• Many had, during marriage, distinct conjugal roles and were therefore quite unaccustomed to undertaking partners' household tasks.• They had grown unaccustomed to using their power of collective action. 