Dictionary / Vocabulary / 知らせる
しらせる
to notify; to advise; to inform
JLPT N4 common word Also written 報せる
サイレンが急変を知らせました。
The siren sounded an emergency.
彼には本当の病名を知らせないで下さい。
Please don't let him know the real name of his illness.
教室に入って席に着くのとほぼ同時に、始業を知らせるチャイムの音が鳴り響く。
About the same time as he entered the classroom and arrived at his seat, the chime to announce class rings across the school.