RichThesaurus
in strict confidence
in strict confidence
synonyms
privately
confidentially
on the QT
privily
behind closed doors
clandestinely
in camera
in secret
slyly
sub rosa
on the quiet
behind someone’s back
on the sly
intimately
by stealth
in holes and corners
unobserved
personally
underhandedly
secretly
in confidence
hush-hush
insidiously
quietly
covertly
obscurely
surreptitiously
stealthily
under the table
furtively
in strict confidence
antonyms
openly
publicly