Meaning of the word "deep down" in English

What does "deep down" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

deep down

US /diːp daʊn/
UK /diːp daʊn/
"deep down" picture

Idiom

1.

referring to one's true feelings or beliefs, often hidden or not openly expressed

Example:
She acts tough, but deep down, she's very sensitive.
I know deep down that he means well.
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