An alert and energetic person.

synonyms: busy bee, eager beaver, sharpie, sharpy.

Roget 157: power; potency, potentiality; jiva^†; puissance, might, force, energy etc. 171; dint; right hand, right arm; ascendency^†, sway, control; prepotency, prepollence^†; almightiness, omnipotence; authority etc. 737; strength etc. 159.    ability; ableness etc. adj.^†; competency; efficacy; efficiency, productivity, expertise (skill) 698; validity, cogency; enablement^†; vantage ground; influence etc. 175.    pressure; conductivity; elasticity; gravity, electricity, magnetism, galvanism, voltaic electricity, voltaism, electromagnetism; atomic power, nuclear power, thermonuclear power; fuel cell; hydraulic power, water power, hydroelectric power; solar power, solar energy, solar panels; tidal power; wind power; attraction; vis inertiae [Lat.], vis mortua [Lat.], vis viva [Lat.]; potential energy, dynamic energy; dynamic friction, dynamic suction; live circuit, live rail, live wire.    capability, capacity; quid valeant humeri quid ferre recusent [Lat.]; faculty, quality, attribute, endowment, virtue, gift, property, qualification, susceptibility.    ... show more

Polish: pracuś