dynamo

/หˆdaษชnษ™moสŠ/
noun
  1. 1

    An electricity generator, a dynamo-electric machine.

  2. 2

    An energetic person.

    โ€œThat new Vice President of Marketing is a real dynamo; sales have already gone up this quarter.โ€

Source: https://en.wiktionary.org/wiki/dynamo