no idea
iunno
don't ask me
search me
beats me
your guess is as good as mine
you tell me
DK
fuck knows
you ask me, I ask who
nonfamiliar
donchaknow
noncertain
uncertain
unprecise
nonprecise
dudder
confusement
bollix
head-scratching
unfamiliarized
unknown
puzzly
don't-know
nubilous
fuck if I know
nonclear
muddy
mazy
undetailed
nondetailed
nondefinite
fugg
AFAIC
not have the faintest
not have the faintest idea
unexact
gnomesayin
confuzzlement
unelaborated
to my knowledge
boggler
perplexing
suspensory
confuzzling
amphibological
ion
nondefinitive
?
addled
imprecise
unsurely
elusive
enquiry
all sixes and nines
exiguously
obscure
unapprehended
ununderstood
mysterious
at sixes and sevens
nonunderstood
head-scratcher
unevident
unfamiliar
befuzzled
unobvious
dunno
non constat
hint
Scooby-Doo
microclue
you'll never guess
non-obvious
nonobvious
confuse
unexperienced
uncertainty
nonknowable
wilsome
nonascertainable
warple
fruit dot
neurilemmal
adiagnostic
indefinite
knowledgelessness
unknowable
bifarious
muddlingly
involute
unconfirmable
who's to say?
cloudy
mind-boggler
feel
nonfamiliar
noncertain
uncertain
unprecise
nonprecise
unfamiliarized
unknown
puzzly
nubilous
nonclear
muddy
mazy
undetailed
nondetailed
nondefinite
unexact
unelaborated
perplexing
suspensory
confuzzling
amphibological
nondefinitive
addled
imprecise
elusive
obscure
unapprehended
ununderstood
mysterious
nonunderstood
unevident
unfamiliar
befuzzled
unobvious
non-obvious
nonobvious
unexperienced
nonknowable
wilsome
nonascertainable
neurilemmal
adiagnostic
indefinite
unknowable
bifarious
involute
unconfirmable
cloudy
to my knowledge
unsurely
exiguously
muddlingly
dudder
confusement
bollix
head-scratching
don't-know
fugg
confuzzlement
boggler
?
enquiry
head-scratcher
hint
Scooby-Doo
microclue
uncertainty
fruit dot
knowledgelessness
mind-boggler
feel
not have the faintest
not have the faintest idea
bollix
confuse
warple
English words for 'I don't know.'
As you may have noticed, above you will find words for "I don't know.". Hover the mouse over the word you'd like to know more about to view its definition. Click 
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