tight-lipped
stonewall
informationlessness
undisclosing
breast one's cards
journalist's privilege
nondisclosed
tightlipped
closelipped
closemouthed
nonconcurrence
secretive
irrevealable
noninformative
be not to know
close
cagey
undivulgeable
unassuring
beat around the bush
equivocate
unwitting
tergiversate
prevaricate
unknowing
understatement
unknowledgeable
palter
shut one's mouth
keep quiet
nonmention
keep one's mouth shut
ignorant
unrevealable
unconfidential
unreconnoitered
leave to the imagination
undivulged
uninforming
priest-penitent privilege
draw a blank
nonspeculation
unhoaxable
detaillessness
no comment
newsless
undecipherability
answerless
keep to oneself
physician-patient privilege