The student was called to the office because he disobeyed school rules.

disobeyed 是动词 disobey 的过去式。disobey 由前缀 dis-（表示"不、否定"）和 obey（"遵守、服从"）组成，字面意思是"不遵守"或"违反"。 在句中 disobeyed 表示"违反了"学校规定这一过去发生的动作。