The key that actually unlocks or serves its intended purpose.

The most relevant or important key in a situation or discussion.

महत्वपूर्ण चाबी

English Usage: "Understanding consumer behavior is the actual key to successful marketing."

Hindi Usage: "उपभोक्ता व्यवहार को समझना सफल विपणन की महत्वपूर्ण चाबी है।"

A key that is genuine or not a counterfeit.

असली चाबी

English Usage: "This is the actual key to the problem we've been trying to solve."

Hindi Usage: "यह वही असली चाबी है जो समस्या का समाधान करेगी।"