know

n.知道，了解；会，懂；认识，熟悉

knock out, knock sb down, knock sb out, knock sb/sth over, knock sth back, knock sth in; knock sth into sth, knock sth together, knock up, knock up against, knock-down, knock-kneed, knock-on, knock-out, knock-up, knockabout, knocker, knoll, knot, knot-hole, knotty, know about, know better than, know no bounds, know of, know sb. by name, know-all, know-how, knowing, knowingly, knowledgable, knowledge, knowledgeable, knowledgeably, known, known as, knuckle, knuckleduster, knucklehead, KO, koala,