be senseless
Definition:
to be senseless, be foolish 1a) (Qal) to be foolish 1b) (Piel) 1b1) to regard or treat as foolish 1b2) to treat with contempt
Definition:
to wilt; generally, to fall away, fail, faint; figuratively, to be foolish or (morally) wicked; causatively, to despise, disgrace; disgrace, dishounour, lightly esteem, fade (away, -ing), fall (down, -ling, off), do foolishly, come to nought, [idiom] surely, make vile, wither.; a primitive root