摸透

mō tòu rén de pí qi

摸透人的脾气

get to know somebody inside out

tā zǒng néng bǎ tā men de jiā dǐ mō tòu

他总能把他们的家底摸透。

He made sure that he turned them upside down and stripped them of any money in their pockets.

wǒ xiǎng qīn rù nà xiē wǒ zhī dào shì zhòng yào de dōng xī bǎ tā men mō tòu

我想侵入那些我知道是重要的东西，把它们摸透。

I want to hack into these things I know are important.