La·bo·ri·ous a.
1. Requiring labor, perseverance, or sacrifices; toilsome; tiresome.
Dost thou love watchings, abstinence, or toil,
Laborious virtues all? Learn these from Cato. --Addison.
2. Devoted to labor; diligent; industrious; as, a laborious mechanic.
-- La*bo*ri*ous*ly, adv. -- La*bo*ri*ous*ness, n.
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laboriousness
n : the quality of requiring extended effort [syn: operoseness,
toilsomeness]