Dictionary.com
Thesaurus.com
Synonyms

unbelievably

British  
/ ˌʌnbɪˈliːvəblɪ /

adverb

  1. in a manner that is hard to believe; astonishingly

    it gets unbelievably hot

  2. (sentence modifier) it is hard to believe that; incredibly

    unbelievably, he remained utterly cheerful

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

But that technology is unbelievably innovative, solid, and we are adopting it.

From The Wall Street Journal • Feb. 21, 2026

They were able to work their way through these unbelievably difficult investigations to bring leading military figures to justice, but also people underneath them.

From Slate • Feb. 17, 2026

"He said to me he slept unbelievably, so he is fit," said Guardiola of Haaland, who has netted 39 times for club and country this season.

From Barron's • Jan. 19, 2026

Emily Southwell, 29, from London, spent two years in Bondi, Sydney, and described her first year as "unbelievably difficult".

From BBC • Dec. 27, 2025

He was happy feeling the gentle pulling and then he felt something hard and unbelievably heavy.

From "The Old Man and The Sea" by Ernest Hemingway