strict, stringent
トップエンジニアが、その車に一連の厳重な検査を加えた。
The top engineer subjected the car to a series of rigorous inspections.
尾行確認を厳重にやらせろ
Have them conduct a thorough check for anyone tailing us.
— GHOST IN THE SHELL (1995)
警戒厳重です
Security is extremely tight.
— フィフス・エレメント (1997)