Source : Webster's Revised Unabridged Dictionary (1913)

Misspend \Mis*spend"\, v. t. [imp. & p. p. {Misspent}; p. pr. &
   vb. n. {Misspending}.]
   To spend amiss or for wrong purposes; to aquander; to waste;
   as, to misspend time or money. --J. Philips.