These nouns denote an act or instance of breaking a law or regulation or failing to fulfill a duty, obligation, or promise. Breach and infraction are the least specific: Revealing the secret would be a breach of trust. Infractions of the rules will not be tolerated. A violation is committed willfully and with complete lack of regard for legal, moral, or ethical considerations: In violation of her contract, she failed to appear.Transgression most often applies to divine or moral law: “The children shall not be punished for the father's transgression” (Daniel Defoe). Trespass implies willful intrusion on another's rights, possessions, or person: “In the limited and confined sense [trespass] signifies no more than an entry on another man's ground without a lawful authority” (William Blackstone). Infringement is most frequently used to denote encroachment on another's rights: “Necessity is the plea for every infringement of human freedom” (William Pitt the Younger).