無む下げにする

expression, suru verb (irregular)

disregard; treat as useless; not make good use of

Used when someone dismisses advice, an offer, or a person's goodwill without proper consideration. Often implies a lack of appreciation or a cold attitude.

• 彼かれは私わたしの忠ちゅう告こくを無む下げにした。

  He disregarded my advice.

• せっかくの好こう意いを無む下げにするのはよくない。

  It's not good to treat someone's kindness as worthless.