say it: uhn-buh-LEE-vuh-blee
unbelievably is an adverb meaning "not easy to believe". It carries 2 recorded senses.
not easy to believe
“incredibly, she survived the crash”
Definitions, synonyms and semantic relations for unbelievably come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.