deep down

ADJECTIVE

deep-seated

Synonyms

STRONGEST

built-in chronic deep-rooted inbred inherent longstanding

WEAK

confirmed deep-down deeply felt dyed-in-the-wool established fixed habitual inborn lodged in one's brain longtime subconscious

Antonyms

STRONGEST

added temporary

ADJECTIVE

dyed-in-the-wool

Synonyms

WEAK

absolute complete confirmed congenital deep-down deep-dyed deep-rooted deep-seated deeply ingrained die-hard entrenched fixed full-fledged genuine hardened infixed ingrained instilled long-standing out and out thorough thoroughgoing through-and-through to the core true unchangeable uncompromising utter well-established

ADVERB

at heart

Synonyms

WEAK

at bottom basically fundamentally in essence in spite of appearance inside

ADVERB

internally

Synonyms

STRONGEST

inside

STRONG

within

WEAK

inwardly mentally privately

ADVERB

inwardly

Synonyms

STRONGEST

internally within

STRONG

at heart privately secretly

WEAK

mentally

Antonyms

WEAK

outwardly

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

But, deep down, he will know that regardless of Champions League qualification, Liverpool are in for a summer of change.

From BBC • May 3, 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 silently curse everyone for these things, knowing deep down I should be cursing myself, because none of it would have happened if I had broken my promise to Hal, and told on him.

From "Challenger Deep" by Neal Shusterman

deep down

Example Sentences

Related Words