reprimand; stern warning
A formal, official warning or reprimand, often used in workplace, school, or legal contexts. Implies a serious, documented notice rather than a casual scolding.
He received a stern warning from his boss for repeated tardiness.
The police issued a stern warning to the violator.
Compound of 厳重 (げんじゅう, 'strict, severe') and 注意 (ちゅうい, 'warning, caution').