The phrase "laborious work" means doing a task or job that requires a lot of effort, hard work, and can be physically or mentally tiring. Full definition
The artist transforms mundane materials such as plastic pearls, glass beads, acrylic paint, crystals, knives, and machine - made Persian rugs into intricate, laborious works of art. (dreamideamachine.com)
Back in the last century, creating case tables was laborious work requiring many hours at the courthouse library. (slaw.ca)
Unlike the kind of lifestyle thousand of years ago, our forefathers didn't need to have core training since they work from sunrise to sunset doing laborious work at the field. (healthandfitnessvitality.com)