Designated by oneself, without formal approval or appointment by authority.

आत्म-नियुक्त

English Usage: The self-appointed leader claimed to have the authority to make decisions for the group.

Hindi Usage: आत्म-नियुक्त नेता ने समूह के लिए निर्णय लेने के लिए अधिकार होने का दावा किया।