View synonyms for laborious


[ luh-bawr-ee-uhs ]


  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: labor:

    a strained, laborious plot.

  4. given to or diligent in work:

    a careful, laborious craftsman.

    Synonyms: painstaking, sedulous, assiduous, industrious, hardworking


/ ləˈbɔːrɪəs /


  1. involving great exertion or long effort
  2. given to working hard
  3. (of literary style, etc) not fluent

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Derived Forms

  • laˈboriously, adverb
  • laˈboriousness, noun

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Other Words From

  • la·bo·ri·ous·ly adverb
  • la·bo·ri·ous·ness noun
  • qua·si-la·bo·ri·ous adjective
  • su·per·la·bo·ri·ous adjective
  • su·per·la·bo·ri·ous·ness noun
  • un·la·bo·ri·ous adjective
  • un·la·bo·ri·ous·ness noun

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Word History and Origins

Origin of laborious1

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

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Example Sentences

Let’s start with the more laborious approach, which broke down into cases depending on how many of the other nine people in the room were also in the top decile.

Quilting—which is inherently more laborious because of the thickness of the fabric—is made easier with an extended table, high-speed straight-stitch capability, and major power.

The laborious forms and appeals process aren’t the only impediments.

From Time

It relies on laborious experimental techniques that can take months or even years.

Getting them to sound any more natural was a laborious manual task.

But through most of the 20th century, printing documents remained an expensive, laborious process.

Depression is often a laborious uphill struggle for the sufferer and their loved ones.

Leo Valencia, the owner of World Logistics MIA, agreed to help Lobo with the laborious task of moving the palettes of Nexcite.

As a result, this season has often felt less like an organic narrative than a laborious calculation.

Leather was another major theme this season, and the detail on some the garments was painstakingly laborious.

On the following morning the Parliament met; and one of the most laborious sessions of that age commenced.

He was a man of great learning and eccentricity, and devoted his long life to laborious study.

He was a laborious writer, in which he was distinguished by his great learning and elegance of style.

He addicted himself to laborious studies and had an extensive knowledge of ancient and modern languages.

Even where conviction is obtained in such cases it is only after the most laborious and expensive processes and investigations.