Emily Dickinson Lexicon

LA-BO'RIOUS, a. [L. laboriosus; Fr. laborieux.]

1. Using exertion; employing labor; diligent in work or service; assiduous; used of persons; as, a laborious husbandman or mechanic; a laborious minister or pastor.
2. Requiring labor; toilsome; tiresome; not easy; as, laborious duties or services.
3. Requiring labor, exertion, perseverance or sacrifices. Dost thou love watchings, abstinence or toil, / Laborious virtues all? Learn these from Cato. – Addison.