vi.食言;违例出牌;
vt.否认;食言,违约;放弃;拒绝;
例句:
They reneged on a pledge to release the hostages.
他们违背承诺,没有释放人质。
to renege on a deal/debt/contract, etc.
违背协定、赖债、违背合约等
You said you'd come, why did you renege on your promise?
你说你要来的, 为什么要背信弃义?