1
renege on sth
作“食言、毁约”讲时是不及物动词，须通过介词 on 接宾语；宾语常是 promise、deal、agreement 等。
They reneged on their promise to reduce pollution.
他们违背了减少污染的承诺。
食言；毁约
先理解核心含义，再看它在真实句子里的用法。
食言；毁约
fail to fulfill a promise or obligation
They reneged on their promise to reduce pollution.
他们违背了减少污染的承诺。
违背承诺或约定；出尔反尔。
To break a promise or commitment; to go back on one's word.
在有跟牌能力时背弃跟牌承诺。
To break one's commitment to follow suit when capable.
renege
Base
原形
reneges
3rd person
第三人称单数
reneging
-ing
现在分词
reneged
Past
过去式
reneged
Past participle
过去分词
He never reneges on his promises.
他从不违背自己的承诺。
The company reneged on the deal last year.
这家公司去年毁约了。
She has reneged on her obligation twice.
她已经两次违背自己的义务。
renege 常与 on 连用，表示违背（承诺、协议等）。
He reneged on his promise to help us move this weekend.
他违背了本周末帮我们搬家的承诺。
If you renege on the contract, you will have to pay a fine.
如果你违反合同，就得支付罚款。
The mayor was accused of reneging on his commitment to build new schools.
市长被指责违背了修建新学校的承诺。
作“食言、毁约”讲时是不及物动词，须通过介词 on 接宾语；宾语常是 promise、deal、agreement 等。
They reneged on their promise to reduce pollution.
他们违背了减少污染的承诺。
Not this
He reneged from his promise.
Use this
He reneged on his promise.
renege 后接宾语时须用固定搭配 renege on something，不能用 from；from 是受中文‘违背、脱离’影响而产生的误用。
Not this
She reneged her word.
Use this
She reneged on her word.
renege 通常作不及物动词，不能直接把 word、promise 等当宾语，必须借助介词 on 来引出未履行的承诺或义务。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
违背承诺；食言
If you renege on a promise, people will stop trusting you.
如果你违背承诺，人们将不再信任你。
背弃交易；毁约
The buyer reneged on the deal at the last minute.
买主在最后一刻背弃了交易。
违反协议；背弃约定
Neither party may renege on the agreement without penalty.
任何一方都不得无故违反协议。
背弃承诺；不履行义务
She reneged on her commitment to volunteer at the hospital.
她背弃了在医院做志愿者的承诺。
违约；不履行合同
The supplier reneged on the contract because of rising costs.
由于成本上涨，供应商违反了合同。
食言；违背承诺
He reneged on his promise to help me move.
他违背了帮我搬家的承诺。
毁约；违背协议
The company reneged on the deal at the last minute.
该公司在最后一刻毁约了。
说话不算数；失信
She reneged on her word and never paid back the money.
她说话不算数，一直没还那笔钱。
Use renege naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：renege 音近“你哥”——你哥说请吃饭却从不请，这就是食言。
语域：formal 常见场景：formal writing、business and legal discussions、political commentary 通常用于正式语境，多指违背承诺、协议或义务，比较常见于书面语、新闻报道以及法律或商业讨论中；日常口语中较少使用。
renege 读作 /rɪˈniːɡ/。真正押韵的词（重音在词尾）有 league、fatigue 和动词 intrigue。注意：colleague 虽以 -eague 结尾且末尾含 /liːɡ/，但重音在第一个音节，不是严格押韵；renegade 拼写相似，读作 /ˈrenɪɡeɪd/，与 renege 不同音。
Dictionary facts from ECDICT, WIKTIONARY.