The Collaborative International Dictionary of English v.0.48:

Mischoose \Mis*choose"\, v. t. [imp. Mischose; p. p.
   Mischosen; p. pr. & vb. n. Mischoosing.]
   To choose wrongly. --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mischoose \Mis*choose"\, v. i.
   To make a wrong choice.
   [1913 Webster]