The ability to make good judgments and quick decisions, typically in a particular domain.

Sharpness or keenness of insight, perception, or discrimination.

तीव्रता या सूक्ष्मता

English Usage: He showed great acumen in understanding the complex issues.

Hindi Usage: उसने जटिल मुद्दों को समझने में बड़ी तीव्रता प्रदर्शित की।