task

(noun) any piece of work that is undertaken or attempted. Synonyms: undertaking, project, labor. Example: "He prepared for great undertakings."

(noun) a specific piece of work required to be done as a duty or for a specific fee. Synonyms: job, chore. Examples: "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."

(verb) assign a task to. Example: "I tasked him with looking after the children."

(verb) use to the limit. Synonyms: tax. Example: "You are taxing my patience."