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Synonyms

laborious

American  
[luh-bawr-ee-uhs] / ləˈbɔr i əs /

adjective

  1. requiring much work, exertion, or perseverance.

    a laborious undertaking.

    Synonyms:
    wearisome, tiresome, hard, difficult, burdensome, onerous, arduous, toilsome
  2. characterized by or requiring extreme care and much attention to detail.

    laborious research.

  3. characterized by or exhibiting excessive effort, dullness, and lack of spontaneity; labored.

    a strained, laborious plot.

  4. given to or diligent in work.

    a careful, laborious craftsman.

    Synonyms:
    painstaking, sedulous, assiduous, industrious, hardworking

laborious British  
/ ləˈbɔːrɪəs /

adjective

  1. involving great exertion or long effort

  2. given to working hard

  3. (of literary style, etc) not fluent

"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

Etymology

Origin of laborious

First recorded in 1350–1400; Middle English word from Latin word labōriōsus. See labor, -ious

Explanation

Laborious describes something that requires a lot of hard work, such as Victor Frankenstein’s laborious undertaking of digging graves to find monster parts. Laborious comes from the familiar word for work, labor, which doesn’t veer far from its roots in Old French meaning "exertion of the body," and from Latin “toil, pain, exertion, fatigue.” Anything that requires blood, sweat, and tears is laborious, and while it’s usually a good thing to work hard, laborious can also describe something over-thought, such as the heavy-handed plot of a bad TV show. Think labor plus boring, said like an old-fashioned English aristocrat: luh-bohr-ee-uhs.

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Vocabulary lists containing laborious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Laborious stop-motion and model effects gave way to computer-generated images.

From Washington Post • Nov. 27, 2015

The Quality of Fancy Light and Airy, She Will Not Yield to the Laborious Wooer In literature, as in life, the quality of fancy is rare—as rare as radium.

From Time Magazine Archive

It seems an enormous sleeper, within whose brain Laborious shadows revolve and break and gleam.

From The House of Dust; a symphony by Aiken, Conrad

Laborious seedsmen—they gather every germ of evil; and laborious sowers—at home they strew them far and wide!

From Gamblers and Gambling by Beecher, Henry Ward

Instead of the Laborious washing more, the Patriotic washed less.

From Another Sheaf by Galsworthy, John

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