until now; until the particular time you are talking about 迄今;直到某时 a hitherto unknown species of moth 迄今仍属未知品种的蛾 Her life hitherto had been devoid of adventure. 迄今为止,她的生活没有冒险。
Oxford Collocations DictionaryHitherto is used with these adjectives:- impossible
- neglected
- unheard-of
- …