à deux
homely
intimate
privately
in petto
close-tiled
private
have a quiet word
have a word in someone's ear
in confidence
under the rose
in secret
private message
esoteric
privateness
inderivatively
privy
inside
proprietary
inwardly
tête-à-tête
off-the-record
nonprivate
absoluteness
personal life
secret
preparatory school
autocephalous
powwow
prep school
anon
self-reliance
tod
autonomy
self-direction
by-interest
self-sufficiency
auricular
on one's own
isolate
hoard
personalness
interiority
anonymosity
on one's bill
heart of hearts
lonesome
closet
selfishly
closeting