run deep

verb

Of a feeling, belief, or problem, to be very intense, serious, and firmly established, often existing for a long time.

“still waters run deep”

Similar
go deep
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Meanings

verbrun deep (third-person singular simple present runs deep, present participle running deep, simple past ran deep, past participle run deep)

present singular third person runs deep · participle present running deep · past ran deep

  1. figurativelyinformalOf a feeling, belief, or problem, to be very intense, serious, and firmly established, often existing for a long time.
  2. CanadianAmerican footballSynonym of go deep.

    Synonyms: go deep

  3. Used other than figuratively or idiomatically: see run, deep.

    still waters run deep

Synonyms & antonyms

verbSynonym of go deep.

Similar
go deep
Also see
go deep
Cite this entry
APA

run deep. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/run%20deep

MLA

“run deep.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/run%20deep. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “run deep,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/run%20deep.

Source: run deep on Wiktionary, CC BY-SA 4.0.