different between unadvisable vs unadvisably

English

un- +? advisable

unadvisable (comparative more unadvisable, superlative most unadvisable)

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.
(archaic) Unwilling to take advice.
(archaic) Imprudent.

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

unadvisable +? -ly

unadvisably (comparative more unadvisably, superlative most unadvisably)

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