到底 1.(到盡頭) to the end; to the finish 打到底 fight to the finish; 堅持到底 hold on to [till] end2.(最后) at last; in the end; after all; finally 試驗到底成功了。the experiment finally proved to be a success.3.(究竟) ever; indeed 你到底說了些什么? what on earth did you say?4.(終究) after all; in the final analysis 別灰心, 這工作對你說來到底還是生疏的。 don't get discouraged, you are new to the work after all