1To fail to properly carry out something one is supposed to do — being careless about it or putting it off.
彼は日頃の練習を怠ったせいで試合に負けた。
He lost the match because he had neglected his daily practice.
機械の点検を怠ると、思わぬ事故につながる。
Neglecting equipment inspections can lead to unexpected accidents.
忙しくても健康管理を怠ってはいけない。
No matter how busy you are, you shouldn't neglect looking after your health.
会社は安全対策を怠った責任を問われた。
The company was held responsible for neglecting safety measures.
2(Dated) For an illness to improve or ease up; rarely used in modern Japanese.
幸い、母の病は怠り、床を離れられるまでになった。
Fortunately, my mother's illness eased, and she was able to get out of bed.