| 单词 | sly | 
| 释义 |  adjective |  noun slysly1 /slaɪ/ adjective (comparative slier or slyer, superlative sliest or slyest) 1a sly smile/glance/wink etc. a smile, look, etc. that shows that you are hiding something you know from other people2very skillful in the way that you use tricks and lies to get what you want:  Be careful, she can be pretty sly.—slyly adverb—slyness noun [uncountable] adjective |  noun slysly2 noun  on the sly secretly, especially when you are doing something that you should not do:  Dick had started drinking again on the sly. | 
	
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