プログレッシブ和英中辞典(第4版)の解説
にぶる【鈍る】
❶〔切れ味が悪くなる〕
はさみが鈍った
The scissors have gotten dull [blunt].
❷〔動きなどが悪くなる〕
年は取っても腕は鈍らない
In spite of his age, he hasn't lost any of his skill.
しばらく練習しなかったらピッチングの腕が鈍った
He didn't practice for a while, and his pitching lost its edge.
そう言われると決心が鈍る
What you have said shakes [weakens] my resolution.
頭が鈍らないように数学の勉強を続けている
I am studying mathematics to keep my brain active.
このごろ聴覚が鈍ってきた
Recently I have been losing my hearing.／Recently my hearing has been failing.
雨で投票の出足が鈍った
Because of the rain we had a poor turnout at the polls.
なまる【▲鈍る】
&fRoman1;〔切れ味が悪くなる〕become blunt [dull]
&fRoman2;〔力などがにぶる〕
しばらく練習を休んでいたので腕がなまってしまった
Since I haven't practiced for some time, my skill has dulled.
適度の運動をしないと体がなまるよ
Lack of moderate exercise will soften your muscles.