noun
four grave prohibitions
Buddhist term for the four most serious precepts: killing, theft, adultery, and deceit. The reading しじゅうごん is also attested but less common.
四重禁は仏教において最も重い戒律の一つです。
The four grave prohibitions are among the most serious precepts in Buddhism.
五戒 is the set of five basic precepts for lay Buddhists, while 四重禁 refers specifically to the four most severe prohibitions.
From 四 (four) + 重 (heavy, grave) + 禁 (prohibition). A Buddhist technical term.