say it: HITH-ur-too
hitherto is an adverb meaning "used in negative statement to describe a situation that has existed up to this point or up to the present time". It is pronounced /ˈhɪˌðɝˈtu/ — HITH-ur-too. It carries one recorded sense.
Definitions, synonyms and semantic relations for hitherto 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.