Subject + 违背 + Noun (principle/promise)
违背 (wéibèi) is a verb meaning "to violate," "to go against," or "to betray." It describes actions that contradict a principle, promise, or agreement. It carries a stronger moral or ethical connotation than simply "breaking a rule," implying a departure from what is right or expected.
他的行为违背了当初的承诺。
tā de xíngwéi wéibèi le dāngchū de chéngnuò.
His actions went against his original promise.
这项决定违背了公平竞争的原则。
zhè xiàng juédìng wéibèi le gōngpíng jìngzhēng de yuánzé.
This decision violated the principle of fair competition.
做人不能违背自己的良心。
zuòrén bù néng wéibèi zìjǐ de liángxīn.
One must not go against one's own conscience.