deep down

Idioms  

1. At bottom, basically. For example, Deep down she was a rebel, or Although he would never admit it, deep down he was very fond of her. [c. 1900]

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Example Sentences

The next revolution in physics may not take us faster than light — but it could reveal that time, deep down in the microscopic world and in a bouncing universe, flows both ways.

From Science Daily • May 22, 2026

Last week, I wrote about a storage space I held on to for more than 30 years, spending $100,000 to keep items I knew, deep down, I’d never really need.

From The Wall Street Journal • Apr. 22, 2026

Maybe it was the underbelly of all of the bravado and power-seeking—some desire to counter all the validation with the humiliation of knowing that, deep down, he’s just a revolting little worm.

From Slate • Apr. 15, 2026

Former contestant Sophie does believe that, "deep down", the host did want to champion that cause.

From BBC • Feb. 15, 2026

I imagine him out there, spinning farther and farther away from the planet Earth, as lonely and scared as I feel deep down inside myself.

From "Before We Were Free" by Julia Alvarez

Related Words

• built-in
• chronic
• deep-rooted
• inbred
• inherent