厳重|げんじゅうgenjuu[0]heiban (flat)

1. na-adjective, nounstrict; severe; stringent; rigorous; rigid; firm; strong; secure
   トップエンジニアが、その車くるまに一連いちれんの厳重げんじゅうな検査けんさを加くわえた。↗

   The top engineer put the car through a series of rigorous tests.

• Synonym厳しいきびしいNeutralFar broader than 「厳重」: strict people and rules, but also harsh conditions, as in 「厳しい先生」 and 「厳しい寒さ」; 「厳重」 is about tight security and strict handling.
• Synonym厳格げんかくWrittenWritten/formal prose: strict and unbending, mostly of people and rules, as in 「厳格な父」.
• SynonymいかめしいWrittenWritten/formal prose: stern, solemn and imposing; also describes tight security, as in 「いかめしい警備」.
• RelatedきついCasualColloquial: severe or tough, and also physically tight, as in 「きつい言い方」.
• Related厳密げんみつWrittenWritten/formal prose: precise and exact with no looseness, as in 「厳密に言えば」; the point is accuracy, not security.
• Antonym甘いあまいNeutralThe opposite of 「厳重」: lax or lenient, as in 「管理が甘い」.

Use 「厳重」 for tight security, strict management or severe handling, as in 「厳重に保管する」 and 「厳重注意」. For strict people and rules pick 「厳しい」 or 「厳格」, for precision 「厳密」, and for the opposite, laxness, 「甘い」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 厳きびしく対処たいしょするさま。
2. 厳おごそかなさま。
3. 霊験れいげん灼あらたかなさま。
4. 尊とうとび重おもんじる。