incommunicative
inexpressible
sacred
uncommunicative
unexpressible
arcane
awesome
awful
cabalistic
censored
classified
close
closed
concealed
cryptic
dark
divine
enigmatic
esoteric
heavenly
hermetic
hidden
holy
hush-hush
incommunicable
inconceivable
incredible
indefinable
indescribable
ineffable
inenarrable
innominable
inviolable
inviolate
latent
marvelous
mysterious
noncommunicable
numinous
occult
prodigious
religious
restricted
sacrosanct
secret
smothered
spiritual
stifled
suppressed
abject
boundless
everlasting
feign
immeasurable
inexplicable
inward
overwhelm
pent-up
poignant
speechless
unbearable
undisguised
unfeigned
unmitigated
untold
utter