Synonyms of unwise

2 Syllables
tomfool, silly, sillier, foolish, witless, bum-steer, loopy, dippy, silliest
3 Syllables
off-the-wall, imprudent, softheaded, ill-judged, senseless, faked-out, unwarned, misguided, unthinking, unguarded, nonviable
4 Syllables
unsensible, irrational, imbecilic, muddleheaded, inexpedient, unreasoning, unadvised, injudicious, overhasty, disinformed, cockamamie, impractical, infeasible, cockamamy, uncircumspect
5 Syllables
unnegotiable, inadvisable, unadvisable, impracticable, unserviceable
6 Syllables
unbusinesslike