dynamo
🇺🇸
/ˈdaɪnəməʊ/
🇬🇧
/ˈdaɪnəməʊ/
A machine that changes movement into electricity.
The dynamo in the bicycle converts pedaling motion into electrical power.
A person full of energy and always active.
Despite her age, she's still a dynamo, always on the go.