crucial point; essential part; linchpin
Formal, somewhat literary term for the most important element or core of a matter. Often used in abstract or political contexts.
この改革案の枢機は、教育制度の見直しにある。
The crucial point of this reform proposal lies in the review of the education system.
外交政策の枢機を担う人物
important state affairs; key matters of governance
Refers specifically to critical matters of state or governance. Rare standalone use; more common in historical or political discourse.
枢機に携わる者は、常に国益を第一に考えねばならない。
Those involved in important state affairs must always put national interest first.
A person who holds the linchpin of foreign policy.
cardinal (Catholic Church)
Compound of 枢 (pivot, hinge) and 機 (mechanism, opportunity), suggesting the central mechanism or pivotal point of a matter. The exact historical derivation is uncertain, but the kanji combination conveys the idea of a crucial, central element.