un
be
lie
va
ble
Comparative
more unbelievable
Superlative
most unbelievable
1
difficult to be believed
- Her excuse for missing the meeting sounded unbelievable and far-fetched.
- The idea of traveling to Mars once seemed unbelievable, but now it’s becoming a reality.
- The story he told about surviving a plane crash was simply unbelievable.
- It was unbelievable that they finished the project so quickly given the tight deadline.
2
so extreme or unexpected that it's hard to accept as true
- The unbelievable price of the item was both insane and outrageous.
- His unbelievable claim about seeing aliens sounded insane and outrageous.
- The unbelievable speed at which the race car zoomed by was both insane and outrageous.
- The unbelievable amount of money they raised in such a short time was insane and outrageous.
- His unbelievable behavior at the party was both insane and outrageous, causing chaos.
Antonyms: