say it: di-MAHN-struh-blee
demonstrably is an adverb meaning "in an obvious and provable manner". It carries one recorded sense.
in an obvious and provable manner
“his documentary sources are demonstrably wrong”
Definitions, synonyms and semantic relations for demonstrably 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.