Wiktionary
hithertofore
adv. (context rare English) heretofore
Usage examples of "hithertofore".
She had verified beyond any possible scientific objections a theory that had been hithertofore only a conjecture.
As you explained, no such contemporary work hithertofore has been known.
And we of the Star Union have, you might say, a special motivation to find a solution to this hithertofore intractable problem.