inadvisable

/ɪnədˈvaɪzəbəl/

Something that's inadvisable is a pretty bad idea. It would be inadvisable to drive around town with your friend riding on the hood of your car.

Things that are unwise or foolish can be described as inadvisable. It's inadvisable to dress your cat in doll clothes, or to jump off the roof of your shed into a pile of leaves. In both cases, the possibility of getting hurt outweighs the entertainment value. If you wouldn't advise a friend to do something, it's inadvisable.

Definitions of inadvisable

1. adjective

   not prudent or wise; not recommended
   “running on the ice is inadvisable”

   synonyms: unadvisable

   imprudent

   not prudent or wise

   foolish

   devoid of good sense or judgment

   antonyms:

   advisable

   worthy of being recommended or suggested; prudent or wise

   best, better

   (comparative and superlative of `well') wiser or more advantageous and hence advisable

   well

   wise or advantageous and hence advisable

   prudent

   careful and sensible; marked by sound judgment

   wise

   having or prompted by wisdom or discernment
2. adjective

   not advisable
   “an unnecessary and inadvisable action”

   synonyms:

   inexpedient

   not suitable or advisable