to communicate through heart or mind without the use of words; especially in Zen Buddhism, the direct transmission of enlightenment from teacher to student

To teach someone orally and have them understand or grasp the meaning intuitively; to pass on knowledge directly from teacher to student.

A set of sixteen characters from the Classic of History regarded by Neo-Confucianists like [[朱熹|朱熹|zhu1 xi1]] as the core ethical and political teachings passed down between the ancient sage kings Yao, Shun, and Yu.