Powerful could be depicted in several ways in Pictionary, depending on the desired difficulty level. Here are some ideas, ranging from simple to more complex:

Easy:

• A superhero: Easy to draw, recognizable silhouette.
• A muscle: Simple anatomical drawing.
• A strongman: A figure with exaggerated muscles.
• A bull: A recognizable animal symbolizing strength.
• A battery: A simple representation of stored energy.

Medium:

• A powerful engine: Requires some detail to show the mechanics.
• A lightning bolt: Dynamic and visually striking.
• A volcano erupting: Shows raw, untamed power.
• A roaring lion: Captures the power of a wild animal.
• A wrecking ball: Illustrates destructive power.

Hard:

• Political power: Requires abstract representation, perhaps through symbols of authority.
• The power of nature: Could depict a storm, earthquake, or other natural phenomenon.
• Electromagnetism: Requires understanding of scientific concepts for accurate depiction.
• Nuclear power: Requires careful representation to avoid misinterpretation.
• The power of suggestion: Highly abstract and challenging to convey visually.

Abstract Representations:

• A glowing aura: Represents unseen power.
• Thick, bold lines: Visually suggests strength and force.
• A large, imposing figure: Suggests dominance and power.

The best choice will depend on the skill level and artistic abilities of the players. Consider the time constraints of the game when selecting a word.