drive something home

見 home

let drive

attack with blows, missiles, or criticism

（用拳、導(dǎo)彈）打，攻擊；抨擊

what someone is driving at

the point that someone is attempting to make

要說的話，意指

I don't understand what you're driving at.

我不明白你的意思。

drive at

To mean to do or say

要做或說

I don't understand what you're driving at.

我不明白您的意思