deep down (inside)

idiom

—used to mean that something is true or real even if it is not said or shown to other people

He knew deep down inside that she was right.

Deep down, I think we all felt the same way.

He might look like a mean old man, but deep down inside he is a very kind person.

Examples of deep down (inside) in a Sentence

Recent Examples on the Web

Wilkerson beat cornerback Ja’Marcus Ingram deep down the field in one-on-one coverage, withstood contact from Ingram, and brought in a higher degree of difficulty catch along the sideline for a 33-yard gain. —Joe Buscaglia, New York Times, 2 Aug. 2025

All his screaming isn’t about rage just lurking underneath the surface or repressed anger hidden deep down, waiting to explode. —Jesse David Fox, Vulture, 30 July 2025

The salicylic acid in this face wash gets deep down into the pores to prevent oil and grime from building up. —Jessica Kasparian, SELF, 16 July 2025

Water moved deep down in the cave, a spring or an underground stream. —Amie Barrodale, Harpers Magazine, 16 July 2025