Как по Английски будет 内心深处

adverb

Used to indicate that something is experienced in one's mind rather than being expressed.

Примеры использования:

I'm still innerly hostile about it

idiom

In the part of your mind where your strongest and often most secret feelings are

Примеры использования:

You say you forgive him, but deep down, aren’t you still angry?

phrase

Near the middle of something, and a long distance from its edges

Примеры использования:

Little red riding hood's grandmother lived in a house deep in the forest., a scan showed damage to …