expression, godan verb (-ru)
be off one's guard; let one's attention lapse; be careless
Used when someone fails to pay proper attention, often leading to a mistake or accident. Common in warnings and self-reflection.
運転中に注意を怠ると事故につながる。
If you let your attention lapse while driving, it can lead to an accident.
彼は注意を怠って
He was careless and made a mistake in the documents.