powerful

Having or capable of exerting power.

Effective or potent.

Great.

Very.

Very: as, powerful good; powerful weak.

Exerting great force or power; able to produce great physical effects; strong; efficient: as, a powerful engine; a powerful blow; a powerful medicine.

Having great authority; puissant; potent; mighty: as, a powerful nation.

Characterized by great intellectual power.

Having great influence or moral power; cogent; efficacious.

Great; numerous; numerically large. Compare power, 10.