Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To make or become deep or deeper.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To make deep or deeper
  • v. To make darker or more intense; to darken
  • v. To make more poignant or affecting; to increase in degree
  • v. To make lower in tone
  • v. To become deeper
  • v. To become darker or more intense
  • v. To become lower in tone

from the GNU version of the Collaborative International Dictionary of English

  • transitive v. To make deep or deeper; to increase the depth of; to sink lower.
  • transitive v. To make darker or more intense; to darken.
  • transitive v. To make more poignant or affecting; to increase in degree.
  • transitive v. To make more grave or low in tone.
  • intransitive v. To become deeper

from The Century Dictionary and Cyclopedia

  • To become deep or deeper, in any sense; increase in depth.
  • To make deep or deeper, in any sense.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. make more intense, stronger, or more marked
  • v. make deeper
  • v. become more intense
  • v. become deeper in tone

Etymologies

From deep +‎ -en (Wiktionary)

Examples

  • If you read him with attention, Williams will expand your mind, will set it on things wondrous and permanent, will make the world you live in deepen because of the new-perceived order.

    The Image of the City « Unknowing

  • She watched the puzzled expression deepen on Olga's face.

    The Splendid Folly

  • Odes are recited to the mysterious ways financial elites "deepen" markets and make them more efficient -- how they even out prices.

    Les Leopold: Wall Street Robber Baron Nets $2.4 Million an Hour While 28 Million Need Jobs

  • Locate the nearest bomb shelter, NOW: "Condoleezza Rice, the US secretary of state, said yesterday that she was going to "deepen" American involvement in the Israeli-Palestinian peace process and "accelerate" progress on the road map."

    Monday, January 15, 2007

  • The Vice President will host a lunch for the Prime Minister and I would expect the other meetings, including the meeting with the President, to address their anticipated entry into NATO, other regional issues involving cooperation in Central and Eastern Europe, and just steps to kind of deepen our bilateral relationship.

    Press Briefing By Staff Members

  • On Dec. 2, she told Washington Post columnist Lally Weymouth she has "great admiration" for Obama, and in her inaugural speech to Congress said she hopes to "deepen" ties with the U.S.

    BusinessWeek.com -- Top News

  • And they will seek to "deepen" US-Brazil ties during stops in Rio and Brasilia, as well as highlight the South American giant's "extraordinary efforts" to reduce poverty and crime.

    Yahoo! News: Business - Opinion

  • Mr van Rumpoy added that the EU will "deepen" its common market with more reforms later this year.

    Telegraph.co.uk - Telegraph online, Daily Telegraph and Sunday Telegraph

  • Security Treaty, the two governments have declared their intention to "deepen" the alliance.

    WN.com - Articles related to LEAD: GSDF officer reprimanded over speech on Japan-U.S. alliance+

  • Among the measures, the Institute for Adult Learning (IAL) will introduce a suite of courses including a Diploma in Adult and Continuing Education to "deepen" the skills of educators in curriculum design, and a Masters Degree in lifelong learning with the University of London, to name a few.

    TODAYonline

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  • Sounds like the letters D P N.

    October 31, 2009