Unbelievably

adv

adv ·5 syllables ·Rare ·Advanced level

Definitions

Adverb

1
In a manner that one does not or cannot believe.
"He gestured unbelievably. Everyone knew he was faking his illness."
2
To an extent not to be believed.
"His face turned unbelievably blue. We realized he was actually choking."
3
Contrary to expectations, amazingly.
"Unbelievably, Rudy saved the man's life but got sued for breaking two of his ribs."

Adverb

1
in an unbelievable manner wordnet
2
not easy to believe wordnet

Synonyms

implausibly implausibly improbably incredibly incredibly

Antonyms

plausibly believably

Example

"It was unbelievably quiet there; perhaps that's why he liked the place so much."

Etymology

From unbelievable + -ly.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.