idiosyncrasy
1 of 1noun/ˌɪdiəˈsɪŋkrəsi/
1
an unusual or strange behavior, thought, or habit that is specific to one person
- His constant humming while working is an idiosyncrasy of his.
- Her habit of always wearing mismatched socks is a charming idiosyncrasy.
- The professor’s idiosyncrasy of speaking in rhymes often puzzled students.
- The writer’s idiosyncrasy of typing with only one finger was well-known among colleagues.
- Her obsession with organizing books by color is a unique idiosyncrasy.