expression, adverb
Describes a firm, unyielding attitude or a grave, dignified manner. Often used with verbs like 言う, 命じる, or 立つ.
彼は厳として不正を許さない。
He sternly refuses to tolerate dishonesty.
社長は厳として改革を命じた。
The president resolutely ordered reforms.
断固として emphasizes firm determination and decisiveness, while 厳として adds a nuance of solemnity or stern authority.
From the kanji 厳 (strict, solemn) combined with the adverbial particle として, forming a set phrase meaning 'in a strict/solemn manner'.