fatigue

疲労

激しい仕事や運動、ストレス、病気などによる強い疲れ。

やさしい英語で： Great tiredness caused by hard work, physical effort, stress, or illness.

• She felt fatigue after the long walk.
• The illness caused weeks of severe fatigue.
• Drivers should stop and rest when fatigue affects their concentration.

使い方： fatigue from something (He suffered fatigue from working long shifts.)

類義語： tiredness, exhaustion

よく使う表現： severe fatigue, mental fatigue, suffer from fatigue, physical fatigue

材料疲労、金属疲労

繰り返し曲げられたり引っ張られたり押されたりして、材料が弱くなることや壊れること。

やさしい英語で： Weakening or breaking of a material because it has been bent, stretched, or pressed many times.

• Metal fatigue caused the crack.
• Engineers tested the bridge cables for fatigue.
• Repeated loading can lead to fatigue in steel parts.

よく使う表現： metal fatigue, fatigue failure, fatigue testing

疲れさせる

体や頭を使わせて、人をとても疲れさせる。

やさしい英語で： To make someone very tired through physical or mental effort.

• The long walk fatigued him.
• Repeated exercises fatigue the muscles.
• Too much detailed reading can fatigue your eyes.

類義語： tire, exhaust, wear out

反対語： refresh

よく使う表現： fatigue someone, fatigue the muscles