idiosyncrasyсуществительное A mode of behavior or way of thought peculiar to an individual. One of her idiosyncrasies was always wearing mismatched socks.
A distinctive or peculiar feature or characteristic of a place or thing. The idiosyncrasies of the local dialect made it difficult for outsiders to understand.
An abnormal physical reaction by an individual to a food or drug. His idiosyncrasy to peanuts meant he had to be very careful with his diet.