unbuxom

from The Collaborative International Dictionary of English v.0.48

Unbuxom \Un*bux"om\, a.
   Disobedient. [Obs.] --Piers Plowman. -- {Un*bux"om*ly}, adv.
   [Obs.] -- {Un*bux"om*ness}, n. [Obs.]
   [1913 Webster]