cardinal

最も重要なルール

A primary or essential rule that should not be broken.

基数

A number denoting quantity (one, two, three, etc.), as opposed to an ordinal number (first, second, third, etc.).

順序数（第一、第二、第三など）に対して、数量を示す数（一、二、三など）。

大罪

In Christian tradition, one of the seven deadly sins; by extension, a very serious offense.

最も深刻な罪の一つを指します。

主要な原則

A fundamental belief or tenet that is considered to be of central importance.

最も重要または主要な原則。

極めて重要なこと

Of the greatest importance; fundamental.

枢要徳

In Christian tradition, one of the four principal virtues (justice, prudence, temperance, and fortitude).

最も重要な道徳的資質の一つを指します。

基本方位

One of the four main points of the compass (north, south, east, and west).

コンパスの4つの主要な方位（北、南、東、西）の一つ。

A high-ranking archbishop who is also a cardinal in the Catholic Church.