neuobičajeno

1. (of degree or manner) unusually; uncommonly; in an unusual way
   Danas je neuobičajeno toplo za oktobar. — It's unusually warm for October today.
   Bio je neuobičajeno tih celo veče. — He was unusually quiet all evening.
   Ponašao se neuobičajeno na sastanku. — He behaved in an unusual way at the meeting.
2. (as a predicate) it is unusual
   Bilo mi je neuobičajeno da ga vidim bez naočara. — It felt strange to see him without his glasses.