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unbelievable
adjective
See more 5-syllable adjectives

How to pronounce unbelievable:

Definition of unbelievable:

unbelievable (adjective):
extremely impressive
too improbable for belief
beyond belief or understanding.
of such a superlative degree as to be hard to believe

Synonyms for unbelievable:

absurd
astounding
believability
credibility
credibleness
doubtful
dubious
dumbfounding
dumfounding
fabulous
fantastic
fantastical
flimsy
full of it
implausible
impossible
improbable
inconceivable
incredible
incredulous
marvellous
marvelous
questionable
ridiculous
silly
Show 11 more

Antonyms for unbelievable:

able to hold water
above suspicion
aboveboard
acceptable
accurate
accustomed
actual
adequate
admissible
anticipated
authentic
average
awaited
bad
balanced
banal
believable
bona fide
boring
certain
cheap
clear
cogent
cogitable
coherent
Show 197 more
Other 5-syllable words

Here are some other common 5-syllable words.

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Syllable Fun Fact
English's rich history of borrowing words from other languages leads to a wide variety of syllable structures, such as the four-syllable word 'television'.

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