Source : Webster's Revised Unabridged Dictionary (1913)

Pusillanimous \Pu`sil*lan"i*mous\, a. [L. pusillannimis;
   pusillus very little (dim. of pusus a little boy; cf. puer a
   boy, E. puerile) + animus the mind: cf. F. pusillanime. See
   {Animosity}.]
   1. Destitute of a manly or courageous strength and firmness
      of mind; of weak spirit; mean-spirited; spiritless;
      cowardly; -- said of persons, as, a pussillanimous prince.

Source : WordNet®

pusillanimous
     adj : lacking in courage and manly strength and resolution;
           contemptibly fearful [syn: {poor-spirited}, {unmanly}]