noun, na-adjective
negligence; neglect; carelessness; procrastination
Refers to a failure to do what one should, often due to laziness or inattention. Used for duties, work, and responsibilities. Can describe a person's attitude or a state of affairs.
彼の怠慢が原因でプロジェクトが遅れた。
His negligence caused the project to be delayed.
そんな怠慢な態度では成功できない。
You can't succeed with such a negligent attitude.