This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Simple past tense and past participle of contravene.

"The following day, the Security Council President issued a press statement declaring the Iraqi decision "totally unacceptable," noting that it "contravened" relevant Security Council resolutions."

contravened    contravenes    contravening   

breach    break    violate    go against    offend   

violate    defeat   

contravention   

defeat    thwart    nullify    contradict    set aside