1 sentence for 彝 (yí — rule)

1. 这套伦理准则被古人视为不可更改的万世不磨之彝。

   zhè tào lún​lǐ zhǔn​zé bèi gǔ​rén shì​wéi bù kě gēng​gǎi de wàn​shì bù mó zhī yí.

   This set of ethical codes was regarded by the ancients as an eternal and immutable law.

   Source: Dong Chinese Dictionary