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Webster's Dictionary (1865)

In-tĕnse', a.

adjective

a. [Lat. intensus, stretched, tight, p. p. of intendere, intensum, to stretch; Fr. intense, Pr. intens, It., Sp., & Pg. intenso. See INTEND.]

  1. Strained; stretched; tightly drawn; closely strained; kept on the stretch; strict; as, intense study or application; intense thought.
  2. Extreme in degree; as, (a.) Ardent; fervent;—said of heat. (b.) Keen; biting;—said of cold. (c.) Vehement; earnest;—said of excitement of feeling or its expression. (d.) Severe; violent;—said of physical pain.