godan verb (-ru), transitive verb
neglect; be negligent in; fail to do
Transitive use: to neglect a duty, task, or obligation. Often used with nouns like 注意, 義務, 手入れ, or 勉強.
彼は注意を怠って事故を起こした。
He neglected to pay attention and caused an accident.
毎日の
If you neglect daily practice, you won't improve.
godan verb (-ru), intransitive verb
Dated intransitive use for an illness improving. Modern Japanese usually uses 良くなる or 回復する instead.
昔の文書では「病が怠る」と書かれることがあった。
In old documents, one might see 'the illness gets better' written as 病が怠る.