dynamo
dynamo — noun
- dynamosingular
- dynamosplural
1. a machine that makes electricity from movement, such as a turning wheel or handl
a machine that makes electricity from movement, such as a turning wheel or handle
A small dynamo under the wheel powered Gabriel's bike light at night.
dynamo power a bike light
At the museum, children turned a dynamo by hand to light a bulb.
turn a dynamo by hand
When Wei pedaled faster, the front dynamo sent more power to the lamp.
The radio kept working because its dynamo fed power into the set.
During the storm drill, the class used a dynamo so the radio could work.
- generator
a broader word for a machine that produces electricity, often larger or less specific
- alternator
a more technical word for a generator that makes alternating current, often in vehicles
文法句型
a dynamo powers a light
turn a dynamo by hand
fit a dynamo to a bicycle
用法筆記
Often used for a small generator on a bicycle or older equipment. The idea is making electricity from movement, not storing power like a battery.
常見錯誤
2. a person who is always full of drive and gets other people moving too
a person who is always full of drive and gets other people moving too
Everyone calls Mira the office dynamo because she solves problems all day.
call someone a dynamo
After the long train ride, Heather still worked like a dynamo backstage.
work like a dynamo
During the final minutes, Tariq became the team's dynamo and lifted everyone.
Christopher, the class dynamo, organized chairs, props, and drinks before lunch.
By sunset, tired adults relied on Kwame, the cleanup dynamo.
- powerhouse
suggests very strong output or influence, often in work, sport, or business
- live wire
more informal and emphasizes excitement or lively behavior
- go-getter
focuses more on ambition and drive to achieve success
- slacker
an informal word for someone who avoids effort or responsibility
- couch potato
an informal word for someone who is lazy and inactive, especially at home
文法句型
be a dynamo
call someone a dynamo
the team's dynamo
用法筆記
Usually used to praise someone who keeps work or activity moving. It often appears after be or in a noun phrase such as the team's dynamo.