Full of energy; showing enthusiasm, vigor, and a strong willingness to work or be active.
From Greek 'energeia' meaning 'activity' or 'operation,' from 'en-' meaning 'in' and 'ergon' meaning 'work.' The suffix '-ic' makes it an adjective. The word traveled through Latin and French before entering English in the 17th century.
The root 'ergon' (work) is the same root we use in 'ergonomics' (the science of how work fits the body) and 'ergs' (units of energy), so energetic people are literally 'in work mode' at all times. Physics and personality science borrowed the same word because they're describing the same phenomenon: the release and use of power.
Complete word intelligence in one call. Free tier — 50 lookups/day.