Source : Webster's Revised Unabridged Dictionary (1913)

Perspire \Per*spire"\, v. i. [imp. & p. p. {Perspired}; p. pr. &
   vb. n. {Perspiring}.] [L. perspirare to breathe through; per
   + spirare. See {Per-}, and {Spirit}.]
   1. (Physiol.) To excrete matter through the skin; esp., to
      excrete fluids through the pores of the skin; to sweat.

   2. To be evacuated or excreted, or to exude, through the
      pores of the skin; as, a fluid perspires.

Perspire \Per*spire"\, v. t.
   To emit or evacuate through the pores of the skin; to sweat;
   to excrete through pores.

         Firs . . . perspire a fine balsam of turpentine.
                                                  --Smollett.

Source : WordNet®

perspire
     v : excrete perspiration through the pores in the skin;
         "Exercise makes one sweat" [syn: {sweat}, {sudate}]