Intensity (noun)

1. The degree of strength or force with which something is done or felt.
2. The degree of concentration or power of a quality or property.
3. The level of energy or effort involved in a situation or activity.

Origin:

Early 17th century: from french intensité or late latin intensitas, from intense.

Examples:

1. The intensity of the workout was challenging, but she pushed herself to finish.
2. The intensity of the storm caused widespread damage.
3. The intensity of the light can be adjusted to match the surrounding environment.
4. The intensity of the debate was high, with both sides passionately arguing their positions.
5. The intensity of the color was so vivid, it was almost as if it was glowing.