The state or quality of being youthful, characterized by freshness, vigor, or enthusiasm.

युवा अवस्था या गुण।

English Usage: "Her youthfulness was evident in her energetic personality."

Hindi Usage: "उसकी युवा अवस्था उसकी ऊर्जीयुक्त व्यक्तित्व में स्पष्ट थी।"