RichThesaurus
not obvious
not obvious
synonyms
unclear
not definite
doubtful
undecided
ulterior
secret
deep
unconvincing
indistinct
borderline
unsettled
marginal
indefinite
in dispute
obscure
under wraps
improbable
recondite
problematical
dubious
unverified
contentious
subliminal
covert
unprovable
apocryphal
spurious
unresolved
cryptic
arguable
debatable
mysterious
arcane
iffy
in doubt
open to doubt
equivocal
problematic
unknown
vague
unsure
moot
dodgy
hidden
in question
uncertain
unfathomable
coded
questionable
open to question
more synonyms
not obvious
antonyms
obvious
clear
indisputable
certain