Unmotorized is an adjective that refers to something that does not rely on a motor for motion or propulsion. Synonyms for this word include non-mechanized, human-powered, manual, and pedal-powered. Non-mechanized refers to something that is operated by human power or animals instead of machines. Human-powered specifically indicates the use of human energy to move something, while manual indicates the use of physical effort rather than mechanical or electrical power. Pedal-powered specifically refers to the use of pedals as a source of power, as in a bicycle. These synonyms can be used interchangeably to describe anything that functions without the use of a motor.