1. the quality or state of being powerful; great strength, force, or effectiveness

Examples

• The powerfulness of the hurricane forced thousands to evacuate.
• She was impressed by the powerfulness of his argument.
• The powerfulness of music can move people to tears.
• The athlete's powerfulness was evident in every movement.
• The powerfulness of the engine made the car accelerate quickly.
• The speech's powerfulness resonated with the audience for weeks.