à deux
homely
intimate
privately
in petto
have a word in someone's ear
have a quiet word
privy
close-tiled
private
privateness
esoteric
proprietary
in secret
nonprivate
private message
under the rose
secret
personal space
tête-à-tête
by-interest
interiority
powwow
prep school
personal life
preparatory school
personalness
turfdom
inderivatively
in confidence
knowing
off-the-record
self-direction
chamber
autonomy
self-sufficiency
self-reliance
home school
offline
autocephalous
confidential
selfishly
closeting
externalistically
hoard
seminary
inside
inwardly
independently
solitarily