Advice or a warning offered to someone, often intended to prevent harm or trouble.
先輩に忠告されたが、あのときは聞かなかった。
I was warned by a senior, but at that time I didn't listen.
医者の忠告を無視すると危険だ。
It's dangerous to ignore the doctor's advice.
忠告してくれてありがとう。よく考えてみるよ。
Thanks for the advice. I'll think it over carefully.