Intelligence (noun)

1. The ability to acquire and apply knowledge and skills.
2. Information about an enemy or potential enemy, especially gathered by espionage.

Origin:

Late middle english (in the sense "capacity for understanding"): from old french intelligence, from latin intelligentia, from intelligere "comprehend".

Examples:

1. His intelligence and quick thinking helped him overcome the problem.
2. She was known for her intelligence and sense of humor.
3. The government is concerned about the leak of classified intelligence.
4. The intelligence agencies are working hard to stay ahead of the terrorists.
5. The company's competitive intelligence unit monitors the competition's strategies.