Choose the most appropriate ANTONYM of the given word.

LETHARGIC

Active 

The most appropriate antonym of the word LETHARGIC is ACTIVE.

• Lethargic means "lacking energy or motivation; sluggish or apathetic."
• Active means "full of energy or activity; lively or vigorous."

The other words do not have the same meaning as active.

• Courteous means "polite and considerate in one's behavior towards others."
• Potent means "having great power or strength; effective."
• Ignoring means "paying no attention to or refusing to consider something."