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comparative unwiser, superlative unwisest
Not wise; lacking wisdom quotations examples
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