The Collaborative International Dictionary of English v.0.48:

Unroot \Un*root"\, v. t. [1st pref. un- + root.]
   To tear up by the roots; to eradicate; to uproot.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Unroot \Un*root"\, v. i.
   To be torn up by the roots. --Beau. & Fl.
   [1913 Webster]