Arrogate (verb)

1. To claim or take something without justification.
2. To take or claim something without the right or without proper authority.

Origin:

Late 16th century: from latin arrogat- "claimed for oneself, taken without right", from the verb arrogare, from ad- "to" + rogare "ask".

Examples:

1. The leader arrogated power to himself by declaring a state of emergency.
2. He arrogated the right to make all the decisions without consulting the others.
3. The company arrogated the responsibility for the project to itself and took credit for it.
4. The government arrogated the authority to regulate the media and control the flow of information.
5. He arrogated the title of CEO even though he was not elected by the shareholders.