knowing
/ˈnəuɪŋ; `noɪŋ/ adj[usu attrib 通常作定语]
1 showing or suggesting that one has information which is secret or not known to others （对别人不知道的秘密）知悉的, 心照不宣的
a knowing look, glance, expression, etc 显出了解内情的样子、 眼光、 表情等.
2 shrewd; cunning 世故的; 狡猾的
She's a bit too knowing for me to feel relaxed with her. 她很有点世故, 和她相处我觉得不自在.