知 （チ） wisdom, jnana (higher knowledge)

知恵 （チエ） wisdom, wit, sagacity, sense, intelligence, prajna (insight leading to enlightenment)

認知 （ニンチ） acknowledgement, acknowledgment, recognition, cognition

熟知 （ジュクチ） being familiar with, having a thorough knowledge of, being well-informed about

知る （しる） to know, to be aware (of), to be conscious (of), to learn (of), to find out, to discover, to sense, to feel, to notice, to realize, to understand, to comprehend, to grasp, to appreciate, to remember, to be familiar with, to be acquainted with, to experience, to go through, to know (e.g. hardship), to get acquainted with (a person), to get to know, to have to do with, to be concerned with, to be one's concern, to be one's responsibility

知るか （しるか） I don't care, how should I know?, who cares?

吾唯足知 （われただたるをしる） I am content with what I am (have), rich is the person who is content with what he is

知らせる （しらせる） to notify, to advise, to inform