ləˈbōrēəs, -bȯr- adjective
Etymology: Middle English, from Middle French or Latin; Middle French laborieux, from Latin laboriosus, from labor + -iosus -ious
1. : devoted to labor : industrious , hardworking , diligent
as men of research … they are magnificently laborious and accurate — Aldous Huxley
2. : involving or characterized by hard or toilsome effort or by detailed elaboration : labored
months of laborious research
slow and laborious transportation
laborious and futile negotiations
several laborious , overlong, painfully “arty” stories — William Peden
picturesque scenery painted with laborious literalism — American Guide Series: Pennsylvania
3. chiefly Britain : doing unskilled labor : laboring
cottages for the laborious and industrious part of the community — G.E.Fussell
• la·bo·ri·ous·ly adverb
• la·bo·ri·ous·ness noun -es