purity
/ˈpjʊərətɪ/noun
mass noun
1- freedom from adulteration or contamination纯净; 洁净, 清洁：
the purity of our drinking water.
我们饮用水的纯净度。
1.1
- freedom from immorality, especially of a sexual nature（尤指性）纯洁, 清白; 贞洁; 童贞：
white is meant to represent purity and innocence.
白色被视作纯洁与清白的象征。
词源
Middle English: from Old French purete, later assimilated to late Latin puritas, from Latin purus 'pure'.