Effort expended on a particular task; toil, work.

That which requires hard work for its accomplishment; that which demands effort.

Workers in general; the working class, the workforce; sometimes specifically the labour movement, organised labour.

To toil, to work.

To belabour, to emphasise or expand upon (a point in a debate, etc).

“I think we've all got the idea. There's no need to labour the point.”

To be oppressed with difficulties or disease; to do one's work under conditions which make it especially hard or wearisome; to move slowly, as against opposition, or under a burden.