The Collaborative International Dictionary of English v.0.48:
Unadvisable \Un`ad*vis"a*ble\, a. Not advisable; inadvisable; inexpedient. --Lowth. -- Un`ad*vis"a*bly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
unadvisable adj 1: not prudent or wise; not recommended; "running on the ice is inadvisable" [syn: inadvisable, unadvisable] [ant: advisable]