unimaginable

Definitions

Impossible to imagine or conceive of.

Difficult to believe or comprehend because of extreme size, degree, or nature.

Examples

The scale of the destruction caused by the earthquake was truly unimaginable.

It is unimaginable that she would betray her closest friend after all these years.

The sheer speed of the new computer processor is almost unimaginable to the average user.

Synonyms

inconceivable unthinkable implausible incredible unfathomable impossible staggering

Antonyms

conceivable thinkable plausible believable credible expected ordinary