possessing or exerting or displaying energy
"an energetic fund raiser for the college"
"an energetic group of hikers"
"it caused an energetic chemical reaction"
working hard to promote an enterprise
"The energetic founder worked tirelessly to promote her new startup."
Possessing or pertaining to energy.
"The energetic child ran around the playground all afternoon without getting tired."
In plain English: Energetic means having lots of energy and being very active.
"The energetic child ran all over the playground without getting tired."
The word energetic comes from the New Latin energeticus, which was borrowed in the 16th century to describe something that is full of activity or power. It ultimately traces its roots back to Ancient Greek terms meaning "to be active."