[ luh-bawr-ee-uhs, -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

OTHER WORDS FROM laborious Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for laboriousness

British Dictionary definitions for laboriousness

/ (ləˈbɔːrɪəs) /


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

Derived forms of laborious

laboriously, adverblaboriousness, 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