hitherto hitherto /ˈhɪˌðɝːˈtuː/

adverb

1. () Used in negative statement to describe a situation that has existed up to this point or up to the present time  ( til now , until now , hitherto , as yet , heretofore , so far , thus far , up to now , yet )
   used in negative statement to describe a situation that has existed up to this point or up to the present time
    So far he hasn't called
   So far he hasn't called
    The sun isn't up yet
   the sun isn't up yet