abstruse
addlebrained
addled
addleheaded
addlepated
befuddled
blind
buried
close
clouded
cloudy
concealed
covered
covert
eclipsed
fogged
foggy
fuddlebrained
fuddled
hazy
hid
hidden
in a cloud
in a fog
in a muddle
in eclipse
in purdah
in the wings
incommunicado
latent
misted
misty
muddled
muddleheaded
muzzy
mysterious
obfuscated
obscure
obscured
occult
puzzleheaded
recondite
secluded
secluse
secret
sequestered
under an eclipse
under cover
under house arrest
under wraps