Rolex, a luxury Swiss wristwatch brand

to put in great effort both mentally and physically; to work extremely hard

an able-bodied person with strong labor power, especially an adult worker used for physical or farming work

To expend a lot of effort and energy; to go through a great deal of trouble.

labor-intensive (describing an industry or business requiring a large workforce)

describes industries or production processes that require a large amount of manual labor

full-time able-bodied laborer or worker, often used in a rural or agricultural context; abbreviation of a longer term for full labor power

a worker with partial labor capacity or a part-time laborer