i Register
In some senses, unadvisable is marked as archaic. Watch for register when choosing this word.
adj
Inadvisable.
No steps were taken to enforce it, as, from the financial embarrassment of the company and the uncompleted state of the line, litigation was unadvisable.
Will go back there to get it in a week or so, but may find the harvest unadvisable for reasons of security.
Unwilling to take advice.
Together with pride there will naturally arise an unadvisable and unconvincible spirit.
Imprudent.