noun
severe admonition; stern warning; good talking-to
A strong, often harsh verbal reprimand or scolding. Used when someone is firmly told off for their actions.
遅刻が続いたので、上司から強意見をされた。
I got a severe talking-to from my boss because I kept being late.
彼は無断欠勤で強意見を食らった。
He received a stern reprimand for his unexcused absence.
叱責 is a formal reprimand, often in official contexts; 強意見 is more colloquial and implies a forceful, personal dressing-down.
Compound of 強 (こわい, 'strong, harsh') and 意見 (いけん, 'opinion, advice'). The reading こわい for 強 is an older or less common reading, giving the word a somewhat idiomatic feel.