Example : I tasked him with looking after the children.

Example : You are taxing my patience.

Synonyms : tax

Example : He prepared for great undertakings.

Synonyms : labor, project, undertaking

Example : Estimates of the city's loss on that job ranged as high as a million dollars.
The job of repairing the engine took several hours.
The endless task of classifying the samples.
The farmer's morning chores.

Synonyms : chore, job