Formal term for refusal to obey authority, rules, or orders. Often used in legal, military, or organizational contexts.
Insubordination toward a superior is subject to disciplinary action.
The soldier was punished for disobedience to orders.
Compound of 不 (fu, 'not') + 服従 (fukujū, 'obedience'), itself from 服 (fuku, 'submit') + 従 (jū, 'follow').