底

底

"底" means "bottom," "base," "end," or "foundation."

Here, '底' is part of the compound '底细', which means 'details' or 'the ins and outs of a situation'.

我终于了解了问题的底细。

I finally understood the details of the matter.

In this sentence, '底' is used in '底部', which means 'the bottom part' or 'base' of an object.

杯子掉在地上，摔破了底部。

The cup fell to the ground, breaking its bottom part.

Here, '底' illustrates 'the bottom' when used in '底端', indicating the lower point of a geographical feature.

我们要走到峡谷的底端去拍照。

We are going to the bottom end of the canyon to take photos.