Questions about example sentences with, and the definition and usage of "Residual"

A: le résidu

A: @andyliu520 An amount of something that is left over from something else.

A: Left over, extra

A: "There was some residual water left on the dishes after they were washed."

Residual suggests that there are small parts of a greater whole left behind after most has gone. Here, there is a bit of water left on the dishes after they have been washed. "Residual" is an adjective, but if you wanted to use it like a noun you could say "residue".
i.e. "There was some residue left on the dishes"
This, however, doesn't specify that is is water but it can be assumed because of the situation.

A: residual is an adjective residue is a noun.

"after the divorce, I still had residual anger"

"after doing the dishes, my sink was covered in a sticky residue"

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