Unadvisable

Origin

- + advisable

Full definition of unadvisable

Adjective

1. Inadvisable.
• 1948, William Burroughs, letter, 5 Jun 1948:Will go back there to get it in a week or so, but may find the harvest unadvisable for reasons of security.
2. (archaic) Unwilling to take advice.
3. (archaic) Imprudent.

Usage notes

"Inadvisable" is used about 10 times more frequently than "unadvisable" at COCA (US usage) and 20 times more at BNC (UK written usage).