homely
intimate
esoteric
à deux
privately
in petto
confidential
privy
private
privateness
private message
have a quiet word
have a word in someone's ear
close-tiled
in secret
inquiry agent
confidant
snoop
secret
tete-a-tete
eavesdropping
head-to-head
nonprivate
proprietary
eavesdropper
personal life
chamber
cabin
tête-à-tête
anon
Sam Spade
contractorization
severalty
hoard
private dick
personal space
knowing
powwow
privatopia
confidable
keep one's counsel
by-interest
relator
query
under the rose
ownability
tete a tete
autonomist
namelessness
keep one's own counsel