All on the sly synonyms
on the sly
O o adv on the sly
- in secret — done, made, or conducted without the knowledge of others: secret negotiations.
- in confidence — full trust; belief in the powers, trustworthiness, or reliability of a person or thing: We have every confidence in their ability to succeed.
- covertly — concealed; secret; disguised.
- behind someone's back — without someone's knowledge or consent
- in camera — a judge's private office.
- furtively — taken, done, used, etc., surreptitiously or by stealth; secret: a furtive glance.
- insidiously — intended to entrap or beguile: an insidious plan.
adj on the sly
- hole-and-corner — secretive; clandestine; furtive: The political situation was full of hole-and-corner intrigue.
- avantgarde — the advance group in any field, especially in the visual, literary, or musical arts, whose works are characterized chiefly by unorthodox and experimental methods.
adverb on the sly
- clandestine — Something that is clandestine is hidden or kept secret, often because it is illegal.
- wildcat — any of several North American felines of the genus Lynx. Compare lynx.