na-adjective, noun
strict; stern; rigorous; severe
Describes a person, attitude, rule, or environment that is uncompromisingly strict and severe. Often used in formal or literary contexts.
彼の峻厳な態度に、誰も口を開けなかった。
No one dared speak under his stern demeanor.
この学校の規則は峻厳を極める。
The rules of this school are extremely strict.