Definition
To unintentionally break a rule or law.
（尤指無意地）違反（規則或法律）。
The company fell foul of the law for failing to comply with the new environmental regulations.
該公司因未能遵守新的環境法規而觸犯了法律。
Many drivers have fallen foul of the new traffic rules and received fines.
許多司機因違反新的交通規則而收到了罰單。
He fell foul of the agreement due to some oversights in the contract.
他因合同中的一些疏忽而違反了協議。