I'll get even with you for this sooner or later.

yifei

I'll get even with you for this sooner or later.

这件事我迟早要跟你算账的。

　　形容词even在这个句子中的意思是“在程度、范围或数量上平等或同一”（Equal or identical in degree, extent, or amount）。用俗话那句“找补回来”理解正好。
　　 再如:
　　 Jerry once played a mean trick on John， and now John wants to get even with him．
　　 杰里曾对约翰耍了一个卑鄙的诡计，现在约翰要讨回来。