Required or necessary in the context of a situation.

Desired to reach or achieve something.

चाहना

English Usage: "He needed a mentor to guide him through his career."

Hindi Usage: "उसे अपने करियर में मार्गदर्शन करने के लिए एक मेंटर की आवश्यकता थी।"

A requirement or necessity for survival or improvement.

A situation that expresses a lack of something.

कमी

English Usage: "He finally understood her need for independence."

Hindi Usage: "उसे अंततः उसकी स्वतंत्रता की आवश्यकता समझ में आई।"