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deepen

B1
Fairly common

Pronunciation

UK

  • /dˈiːpən/

US

  • /ˈdipən/

Meanings

Verb

  1. to become or make something more intense, serious, or strong

  2. to become or make something physically deeper

  3. to make knowledge or understanding stronger and more complete

Beyond the definition

Just like a river carves its path deeper into the earth over time, to deepen something means to make it stronger, more profound, or more intense. You might deepen your understanding of a subject by studying it further, or deepen a friendship through shared experiences.

Think about sound—a deep voice has a richer, fuller quality than a high-pitched one. Similarly, when you deepen a color, you make it more vibrant and saturated. It's not just about adding more of something; it's about enhancing its existing qualities. A detective might deepen an investigation to uncover hidden clues, or a musician might deepen their practice to master a difficult piece.

Examples

  1. 1

    Voice change

    His voice deepened in his late teens.

  2. 2

    Color change

    The red in the leaves deepened as autumn went on.

  3. 3

    Economic trouble

    The recession deepened after several large factories closed.

  4. 4

    Understanding

    Reading the original letters helped deepen her understanding of the war.

More examples
  1. 5

    Personal interest

    Living abroad for a year deepened his interest in other cultures.

  2. 6

    Relationship

    Going through that difficult time together deepened their friendship.

  3. 7

    Public concern

    The report only deepened public concern about air quality.

See also

Similar

Shades of meaning

Contrast

Used with (collocations)

  • deepen understanding
  • deepen a relationship
  • deepen a crisis
  • deepen divisions

Word family

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Forms and spellings

4 forms open this card.

Main spelling

  • deepenverb

Forms

  • deepening-ing formverb
  • deepenedpast tenseverb
  • deepensverb