危

Compound character, with interpretations:

厃 (우러러볼 첨) — represents a steep or high place (cliff).

㔾 (병부 절) — often denotes a person or human figure.

Together they depict “a person on a high/steep place,” i.e., precarious, in danger.

Alternate analysis:

From 厄 (액, misfortune) + 人 (사람 인) - “a person in peril/misfortune.”

Thus the core sense is danger, risk, or being on the verge of falling.

危險 (위험) — danger

危殆 (위태) — precarious, at risk

安危 (안위) — safety and danger, well-being

危機 (위기) — crisis

危坐 (위좌) — to sit upright, formally