RichThesaurus
slyly
slyly
synonyms
trickily
surreptitiously
knavishly
furtively
foxily
craftily
cunningly
artfully
covertly
on the sly
secretly
stealthily
clandestinely
on the quiet
sneakily
in secret
behind someone's back
under cover
under the counter
sub rosa
on the QT
sidelong
on the q.t.
indirectly
in camera
sideways
on the side
privately
by stealth
obliquely
in holes and corners
askance
hush-hush
without someone's knowledge
under the table
undercover
underhandedly
wildcat
under wraps
unobserved
intimately
behind someone’s back
confidentially
privily
insidiously
quietly
in confidence
behind closed doors
personally
deceitfully
slyly
definitions
adv
In a sly manner, cunningly.