toil
toil away

Parents toil away for 40 hours or more in the office.

We toiled away and worked hard but didn't get our game going.

They toil away, trapped in their plots and characters just as we are.

They continued to toil away at their allotted tasks, only dimly aware that the ship had changed around them.

Hundreds of locals toiled away in a notorious linen mill during the 19th century.

They toil away for years on a single work.

Most of them toil away at newspapers and television stations, working behind the scenes, often months at a time on a single project.

He gave me endless free refills of coffee as I toiled away.

Indeed, she seemed content to toil away, hour by hour.

He toils away on stage, building up a great sweat, as if in competition with all the factories in China.