Intensity of feeling or action; eagerness, incisiveness.

Intensity, forcefulness; an amplification of something. Obsolete.

Thoroughness; energy, activity. Obsolete.

Strong or energetic action, esp. in administration or government; the power, exercise, or use of this, esp. as possessed by or as an attribute of…

Vigorous or energetic action; activity, energy, vigour; spirit. Now rare.

High-strung quality of personal feeling or emotion; strenuous energy of action.

figurative. Incisiveness, keenness of action or apprehension.

The quality or condition of being intensive; vehemence, intensity.