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Synonyms

deepen

American  
[dee-puhn] / ˈdi pən /

verb (used with or without object)

  1. to make or become deep or deeper: deep.

    Larger ships will be able to navigate the river after the main channel is deepened. The shadows deepened toward late afternoon.

  2. Meteorology. to decrease in atmospheric pressure.

    a deepening cyclone.
deepen British  
/ ˈdiːpən /

verb

  1. to make or become deep, deeper, or more intense

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • deepener noun
  • deepeningly adverb
  • overdeepen verb (used with object)
  • undeepened adjective

Etymology

Origin of deepen

First recorded in 1595–1605; deep + -en 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.