The Collaborative International Dictionary of English v.0.48:
Misthink \Mis*think"\, v. i. [See Think.] To think wrongly. [Obs.] "Adam misthought of her." --Milton. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Misthink \Mis*think"\, v. t. To have erroneous thoughts or judgment of; to think ill of. [Obs.] --Shak. [1913 Webster]