Source : Webster's Revised Unabridged Dictionary (1913)

Enlivener \En*liv"en*er\, n.
   One who, or that which, enlivens, animates, or invigorates.

Source : WordNet®

enlivener
     n : an agent that gives or restores life or vigor; "the soul is
         the quickener of the body" [syn: {quickener}, {invigorator}]