言いうだけ無む駄だ

expression

it's a waste of words; there's no point in saying

Used to dismiss the idea of speaking because it would be futile or have no effect. Often said when the listener won't listen or the outcome is already decided.

• 彼かれに注ちゅう意いしても言いうだけ無む駄だだよ。

  It's a waste of breath to warn him.

• 今いまさら文もん句くを言いっても言いうだけ無む駄だだ。

  There's no point in complaining now.