peculiarity

US /pɪˌkjuː.liˈer.ə.t̬i/
UK /pɪˌkjuː.liˈer.ə.t̬i/
1.

đặc thù

the quality of being strange or unusual, or an unusual characteristic or habit:

:
You couldn't help but be aware of the peculiarity of the situation.