(a.) Not wise; defective in wisdom; injudicious; indiscreet; foolish; as, an unwise man; unwise kings; unwise measures.

bad brainless childish fatuous foolish futile headless ignorant ill-advised ill-considered ill-contrived ill-devised ill-gauged ill-judged ill-suited ill-timed immature impolitic impractical improper imprudent inadvisable inane inappropriate inapt incongruous inconsiderate indiscreet inept inexpedient infelicitous injudicious inopportune insensate irrational lackbrained lean-minded lean-witted mal a propos malapropos mindless misadvised misguided myopic naive not bright of little brain out of place pea-brained penny-wise and pound-foolish pin-brained reasonless reckless senseless shortsighted slackminded slackwitted thoughtless unadvised unbefitting unconsidered undesirable undiscerning unfit unfitting unforeseeing unfortunate ungifted unhappy unintellectual unintelligent unmeet unprofitable unreasonable unreasoning unreflecting unreflective unseasonable unseeing unseemly unsensible unsound unsuitable untalented unthinking unthoughtful untimely witless wrong