hitherto(副词):迄今;到目前为止;直到此时。(较正式/书面语用法;也可理解为 up to now / until now。)
/ˌhɪðərˈtuː/
Hitherto, I had never heard of that author.
迄今为止,我从未听说过那位作者。
The company had hitherto focused on the domestic market, but it is now expanding overseas.
这家公司此前一直专注于国内市场,但现在正向海外扩张。
来自中古英语的结构组合:hither(“到这边”)+ to(“到”)。早期含义可理解为“到此为止/直到现在”,后来固定为较正式的“迄今、至今”。