Source : Webster's Revised Unabridged Dictionary (1913)

Mis- \Mis-\ [In words of Teutonic origin, fr. AS. mis-; akin to
   D. mis-, G. miss-, OHG. missa-, missi-, Icel. & Dan. mis-,
   Sw. miss-, Goth. missa-; orig., a p. p. from the root of G.
   meiden to shun, OHG. m[=i]dan, AS. m[=i]?an (????. Cf. {Miss}
   to fail of). In words from the French, fr. OF. mes-, F.
   m['e]-, mes-, fr. L. minus less (see {Minus}). In present
   usage these two prefixes are commonly confounded.]
   A prefix used adjectively and adverbially in the sense of
   amiss, wrong, ill, wrongly, unsuitably; as, misdeed, mislead,
   mischief, miscreant.