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deepen

[dee-puh n] /ˈdi pən/
verb (used with object), verb (used without object)
1.
to make or become deep or deeper:
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.
Origin of deepen
1595-1605
1595-1605; deep + -en1
Related forms
deepener, noun
deepeningly, adverb
overdeepen, verb (used with object)
undeepened, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for deepen
Contemporary Examples
Historical Examples
  • Solitude we can deepen by a single volition, and by a single volition let in upon it the stir and noise of the world and life.

  • And a second and a third month may only deepen the sense of ignorance and unfitness.

  • All along the stream are drawn grey lines of vapour that, in the far recesses of the valley, deepen to a shadowy gloom.

    In the West Country Francis A. Knight
  • Her face was very grave and the lines about her mouth seemed to deepen.

    Keziah Coffin Joseph C. Lincoln
  • It is often sought to deepen our sense of this tragedy by speculating on what Shelley would have done if he had lived.

    Shelley Sydney Waterlow
British Dictionary definitions for deepen

deepen

/ˈdiːpən/
verb
1.
to make or become deep, deeper, or more intense
Derived Forms
deepener, noun
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
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Word Origin and History for deepen
v.

c.1600, from deep (adj.) + -en (1). Related: Deepened; deepening. The earlier verb had been simply deep, from Old English diepan.

Online Etymology Dictionary, © 2010 Douglas Harper
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