Is “Hitherto” a Scrabble word?
Yes
HITHERTO
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Hitherto
/ˈhɪðəˌtuː/
adverb
1.Up to this or that time.
Synonyms: heretofore, up to now