1. Peculiar or distinctive characteristics, habits, or ways of behaving that are particular to an individual or group
Each person has their own idiosyncrasies that make them unique.
Cada pessoa tem suas próprias idiossincrasias que a tornam única.
2. An unusual physical reaction or sensitivity to something
She has an idiosyncrasy to certain medications.
Ela tem uma idiossincrasia a certos medicamentos.
3. A distinctive or characteristic feature of a particular person, group, or thing
The idiossyncrasies of the local dialect make it interesting.
As idiossincrasias do dialeto local o tornam interessante.