implausible

Definitions

Not seeming reasonable or probable; failing to convince.

Unlikely to be true or believable.

Examples

The detective found the suspect's alibi completely implausible given the timeline of events.

It seems highly implausible that the small startup could outperform such a massive global corporation.

Synonyms

unlikely improbable doubtful dubious far-fetched unconvincing questionable

Antonyms

plausible likely probable believable credible convincing reasonable