say it: im-PAH-suh-blee
impossibly is an adverb meaning "to a degree impossible of achievement". It carries one recorded sense.
to a degree impossible of achievement
“long thought to be an impossibly difficult operation”
“impossibly far from sources of supply”
Definitions, synonyms and semantic relations for impossibly 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.