ken
/ken; kɛn/ n
(idm 习语) beyond/outside one's ken not within one's range of knowledge 超出某人知识范围
The workings of the Stock Exchange are beyond most people's ken. 证券交易所的运作情况大多数人都不了解.
ken / ken; kɛn/ v (-nn-, pt kenned or kent, pp kenned) [Tn, Tf, Tw]
(Scot 苏格兰) know 知道.