Source : Webster's Revised Unabridged Dictionary (1913)

Misthink \Mis*think"\, v. i. [See {Think}.]
   To think wrongly. [Obs.] ``Adam misthought of her.''
   --Milton.

Misthink \Mis*think"\, v. t.
   To have erroneous thoughts or judgment of; to think ill of.
   [Obs.] --Shak.