Breachy is an adjective that refers to something or someone that tends to break the rules or protocols. Some synonyms for this word include disruptive, rebellious, disobedient, insubordinate, contumacious, recalcitrant, and wayward. Disruptive refers to something or someone that causes disorder or trouble. Rebellious carries a connotation of challenging or defying authority. Disobedient implies a refusal to follow rules or instructions. Insubordinate suggests a lack of respect for authority or superiors. Contumacious is a more formal term that describes someone who is stubbornly rebellious. Recalcitrant describes someone that is difficult to manage or control. Wayward suggests someone that is unpredictable or difficult to control.