If you describe something as unwise, you think that it is foolish and likely to lead to a bad result. It would be unwise to expect too much a series of unwise investments in plastics and shipping. sensible + unwisely un·wise·ly She accepted that she had acted unwisely and mistakenly = foolishly. not based on good judgment (it is) unwise to do sth
showing or resulting from lack of judgment or wisdom; "an unwise investor is soon impoverished"