un advisable (adjective) imprudent: without much thought
Sinonime: brash,
careless, foolhardy,
foolish,
heedless, ill-advised, ill-considered, ill-judged, impolitic, improvident, incautious,
inconsiderate, indiscreet, inexpedient, injudicious,
irresponsible, leaving self wide open, off the deep end, overhasty, playing with fire,
rash,
reckless, temerarious,
thoughtless, unadvisable, unthinking, unwise
Antonime: careful,
cautious,
discreet,
prudent,
wise