■ adjective ( ~er , ~est )
1》 having a cunning and deceitful nature.
2》 (of a remark, glance, or expression) insinuating.
3》 (of an action) surreptitious.
Phrases
on the ~ in a surreptitious fashion.
Derivatives
~ly (also slily ) adverb
~ness noun
Origin
ME (also in the sense 'dexterous'): from ON slœgr 'cunning'.