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human dynamo

human dynamo

1 5.9
A person who has a lot of energy and does not get tired
  • noun
  • /ˈhjuːmən ˈdaɪnəmoʊ/
translation icon : dínamo humana
  • His ability to keep going all day makes him a true human dynamo at work.

Examples

  • I am tempted to call him a human dynamo.

    Academic text (1990)
  • Not everybody's a human dynamo like you.

  • Stand back, Idaho, and watch this human dynamo in action!

    Blog text (6)
  • He was a human dynamo, writing books, lecturing all over the world... ...giving expert opinion in trials, working crimes in the city.

  • Everyone who knows her agrees that she's a human dynamo who never seems to tire.

  • Despite her age, she remains an unstoppable human dynamo, always full of energy.

Synonyms

fireball
vshuman dynamo
  • Informal
4 4.8

A person who is very active and full of energy

is endlessly energetic and never seems to get tired
energizer
vshuman dynamo
  • US
3 4.6

A person who makes other people feel more energetic and motivated

is endlessly energetic itself rather than mainly giving energy to others
ball of fire
vshuman dynamo
  • Informal
1 5.4

A person who is very energetic and enthusiastic

is continuously energetic and does not seem to tire

How Energetic

human dynamo
1 5.9
live wire
  • Informal
2 4.6
Joe Average
  • Informal
1 5.2
couch potato
  • Informal
11 4.3

Surface Forms

human dynamo singular
human dynamos plural

Morphology

human + dynamo

If a learner knows 'human' (person) and 'dynamo' (a device or source that generates power / energetic force), the metaphorical composition is straightforward: a human who generates energy = an extremely energetic person. The noun‑noun combination follows a predictable metaphorical mapping rather than an arbitrary idiom, so the meaning is readily derivable from the parts.

Etymology

Human dynamo comes from comparing a person to a dynamo, a machine that makes steady power without stopping. So calling someone a human dynamo gives the image of a person who is 'very energetic' and 'never seems to get tired'.