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[luh-bawr-ee-uh s, -bohr-] /ləˈbɔr i əs, -ˈboʊr-/
requiring much work, exertion, or perseverance:
a laborious undertaking.
characterized by or requiring extreme care and much attention to detail:
laborious research.
characterized by or exhibiting excessive effort, dullness, and lack of spontaneity; labored:
a strained, laborious plot.
given to or diligent in work:
a careful, laborious craftsman.
Origin of laborious
First recorded in 1350-1400; Middle English word from Latin word labōriōsus. See labor, -ious
Related forms
laboriously, adverb
laboriousness, noun
quasi-laborious, adjective
quasi-laboriously, adverb
superlaborious, adjective
superlaboriously, adverb
superlaboriousness, noun
unlaborious, adjective
unlaboriously, adverb
unlaboriousness, noun
1. toilsome, arduous, onerous, burdensome, difficult, hard, tiresome, wearisome, fatiguing. 4. hardworking, industrious, assiduous, sedulous, painstaking. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for laboriousness
Historical Examples
  • The chief characteristic is the minute laboriousness of the execution.

    Across the Equator Thomas H. Reid
  • And it is just in those areas that one may see at their best the grit, laboriousness, and enterprise of the Moplah.

  • There, in fine, is the place where real lassitude must be undergone by the body in laboriousness.

  • He says that the laboriousness of Stevenson and Flaubert has 'gone out' and the public are bored by it.

    The Secret Life

    Elizabeth Bisland
  • Gas will be made on a larger scale, with less dirt and nuisance, and without that laboriousness now made necessary.

  • The picture of President Adams's daily life is striking in its simplicity and its laboriousness.

    John Quincy Adams John. T. Morse
  • His laboriousness and assiduity: his readiness to hear any man that had ought to say, tending to any common good.

    No Cross, No Crown William Penn
  • They had not climbed so far above the river as they had imagined from the laboriousness of the ascent.

    The Bungalow Boys Along the Yukon

    Dexter J. Forrester
  • A large head and broad brow indicated slowness, but laboriousness.

British Dictionary definitions for laboriousness


involving great exertion or long effort
given to working hard
(of literary style, etc) not fluent
Derived Forms
laboriously, adverb
laboriousness, 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 laboriousness



late 14c., "hard-working, industrious," from Old French laborios "arduous, wearisome; hard-working" (12c., Modern French laborieux), from Latin laboriosus "toilsome, wearisome, troublesome," from labor (see labor (n.)). Meaning "costing much labor, burdensome" is from early 15c.; meaning "resulting from hard work" is mid-15c. Related: Laboriousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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