privately
close-tiled
intimate
homely
have a word in someone's ear
have a quiet word
in petto
à deux
tête-à-tête
private message
private
inside
esoteric
inwardly
in secret
under the rose
auricular
secret
independently
head-to-head
tete-a-tete
personally
anonymously
privy
live
doggo
in hiding
out of sight
closet
heart of hearts
private means
eavesdropper
privateness
concealedly
eavesdropping
confidentially
in camera
whisper
offline
confidant
private language
nonprivate
sub rosa
solitudinously
keep one's own counsel
have a word
on the hush
tete a tete
confide
seclusively