Formal, literary term for a state of danger or crisis. Often used in set phrases like 危殆に瀕する (to be on the verge of danger). Not used in casual conversation.
That policy could plunge the nation into danger.
彼の行動は会社を危殆にさらした。
His actions exposed the company to jeopardy.
face danger; be in imminent crisis
A Sino-Japanese compound corresponding to Chinese 危殆; both elements contribute the sense of danger or peril.