sly
/slaɪ; slaɪ/ adj
(-er, -est)
1 (often derog 常作贬义) acting or done in a secret, often cunning and deceitful, way 狡猾的; 狡诈的
a sly fellow, trick, ruse 狡诈的家伙、 伎俩、 计谋
(joc 谑) You sly old devil! 你这个老奸巨猾的家伙!
It was sly of you not to tell us you'd already met. 你们真坏, 已经见了面还瞒著我们.
2 [usu attrib 通常作定语]
suggesting that one knows sth secret; knowing 会意的; 会心的
a sly smile, look, etc 会心的一笑、 表情等
She cast a sly glance at her bridge partner. 她向桥牌搭挡使了个会意的眼色.
3 mischievous; playful 淘气的; 顽皮的
play a sly trick on a friend 作弄朋友.
4 (idm 习语) on the `sly secretly 秘密地
She must have been having lessons on the sly. 她准是暗地里一直在上课.