-ity
/ətɪ/suffix
1- forming nouns denoting quality or condition构成名词表示“特性”, “特点”, “状态”：
humility
probity.
1.1
- denoting an instance or degree of this表示“实例”, “程度”：
a profanity.
词源
from French -ité, from Latin -itas, -itatis.