FluentPlex

deepen

/ˈdiːpən/ verb B2
  1. To make deep or deeper (transitive) · They deepened the well by 200 feet.
  2. To make darker or more intense; to darken (transitive) · The event deepened the prevailing gloom.
  3. To make more poignant or affecting; to increase in degree (transitive) · News of her death deepened my sorrow.
  4. To make lower in tone (transitive) · The tuner deepened the tone of the organ.
  5. To make more thorough or extensive. (transitive) · The class deepened my understanding of the subject.
  6. To make more intimate. (transitive) · The shared experiences deepened our relationship.
  7. To make more sound or heavy. (transitive) · The hypnotist then proceeded to deepen his trance.
  8. To become deeper (intransitive) · The water deepens as you go toward the middle of the channel.

He/she/it deepens · Past deepened · Past participle deepened · -ing form deepening

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Verb forms

Base form
deepen
He/she/it
deepens
Past
deepened
Past participle
deepened
-ing form
deepening

From the library

As the weeks went by, my interest in him and my curiosity as to his aims in life, gradually deepened and increased.
A Study in Scarlet, p. 12 · B2
A big round moon, slowly deepening from her pallid luster into burnished silver, hung over the Haunted Wood; the air was full of sweet summer sounds--sleepy birds twittering, freakish breezes, faraway voices and laughter.
Anne of Green Gables, p. 275 · C1
They all tend to deepen the impression upon my mind that the Cunninghams, father and son, had written this letter.
The Memoirs of Sherlock Holmes, p. 50 · B2

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.