special characteristics; peculiarity; distinctiveness
Refers to the quality of being special or distinct, often used in formal or analytical contexts to highlight unique traits.
The culture of this region has its own distinctiveness.
His research focuses on the peculiarities of language.
Compound of 特殊 (とくしゅ, 'special') + 性 (せい, '-ness, -ity'), forming an abstract noun meaning 'specialness' or 'peculiarity'.