Source : Webster's Revised Unabridged Dictionary (1913)

Enliven \En*liv"en\, v. t. [imp. & p. p. {Enlivened}; p. pr. &
   vb. n. {Enlivening}.] [Pref. en- + liven.].
   1. To give life, action, or motion to; to make vigorous or
      active; to excite; to quicken; as, fresh fuel enlivens a
      fire.

            Lo! of themselves th' enlivened chessmen move.
                                                  --Cowley.

   2. To give spirit or vivacity to; to make sprightly, gay, or
      cheerful; to animate; as, mirth and good humor enliven a
      company; enlivening strains of music.

   Syn: To animate; rouse; inspire; cheer; encourage; comfort;
        exhilarate; inspirit; invigorate.

Source : WordNet®

enliven
     v 1: heighten or intensify; "These paintings exalt the
          imagination" [syn: {inspire}, {animate}, {invigorate}, {exalt}]
     2: make lively; "let's liven up this room a bit" [syn: {liven},
         {liven up}, {invigorate}, {animate}] [ant: {deaden}]