纯洁 (chún jié) is an adjective meaning 'pure,' 'chaste,' or 'innocent.' It combines two characters: 纯 (chún), which means 'pure' or 'unmixed,' and 洁 (jié), which means 'clean' or 'spotless.' Together, they intensify the idea of moral, spiritual, or emotional purity—free from corruption, deceit, or worldly impurity. It’s often used to describe people (especially children or idealized figures), intentions, love, faith, or ideals.

The word carries a gentle, elevated tone and appears frequently in literature, poetry, formal speeches, and moral education. While it can refer to physical cleanliness in rare contexts, its primary use is abstract and ethical—emphasizing sincerity, integrity, and unspoiled goodness. It’s commonly paired with nouns like 心灵 (xīn líng, 'heart/mind'), 爱情 (ài qíng, 'love'), or 理想 (lǐ xiǎng, 'ideal'). Unlike colloquial terms for 'clean' (e.g., 干净 gān jìng), 纯洁 is rarely used for everyday hygiene or objects.