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hard to believe

ADJECTIVE
questionable
Synonyms
STRONGEST
ambiguous arguable controversial debatable dubious problematic suspicious unproven vague
WEAK
apocryphal contingent controvertible cryptic disputable dubitable enigmatic equivocal fishy hypothetical iffy indecisive indefinite indeterminate moot mysterious obscure occult open to doubt open to question oracular paradoxical problematical provisional shady suspect unconfirmed undefined under advisement under examination unreliable unsettled
Antonyms
STRONGEST
certain clear definite incontrovertible indubious sure trustworthy trusty undoubted unquestionable
WEAK
indisputable proven
ADJECTIVE
unsubstantiated
Synonyms
STRONGEST
debatable dubious unsupported
WEAK
arguable controversial disputable doubtful dubitable fishy iffy indefinite open to doubt open to question suspect suspicious uncertain unconfirmed uncorroborated
Antonyms
STRONGEST
certain sure

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It almost seems hard to believe in hindsight, but Wall Street economists saw a recession as a near-certainty after the previous oil price spike in 2022.

From MarketWatch • Apr. 16, 2026

Kelly: Is it quite hard to believe in that at times, though, because you kind of... you can control so much, but you can't control your luck?

From BBC • Apr. 11, 2026

It is hard to believe that the majority truly wants to jeopardize all the laws that Jackson highlights.

From Slate • Mar. 31, 2026

Great for windsurfing, as well as human or canine jogs, Guincho is so wild and natural it is hard to believe it is so close to an urban center and seafood restaurants galore.

From The Wall Street Journal • Mar. 27, 2026

It’s hard to believe that I’m walking through the school hallways wearing a shalwar kameez, and it wasn’t my mother’s idea.

From "Amina's Song" by Hena Khan