Exertion

exertion

noun: exertion; plural noun: exertions

    1.
    physical or mental effort.
    "she was panting with the exertion"
    synonyms: effort, strain, struggle, toil, endeavour, hard work, labour, industry, {blood, sweat, and tears}; More
    pains, assiduity, assiduousness;
    exercise, activity;

    2.
    the application of a force, influence, or quality.
    "the exertion of authority"
    synonyms: use, application, appliance, bringing to bear, exercise, employment, utilization;