unwise

Etymology

From Middle English unwis, from Old English unwīs (“unwise, foolish, ignorant, uninformed, insane”), equivalent to un- + wise. Cognate with Dutch onwijs (“unwise”), German unweise (“unwise”), Danish uvis (“unwise”), Swedish ovis (“unwise”), Icelandic óvís (“unwise”).

adj

1. Not wise; lacking wisdom
   unwise man
   unwise kings
   unwise measures
   If the kind of network we envisage is to be established, it would be unwise to begin any of its services hurriedly with older stock, which, however admirable in its day, now has an air of faded Edwardian splendour that is out of joint with the times. 1962 December, “A new Pullman era?”, in Modern Railways, page 362