something or someone that is difficult to understand
कुछ या कोई जिसे समझना मुश्किल है (kuch ya koi jise samajhna mushkil hai)
"He’s a closed book when it comes to his personal life."
"वह अपनी निजी जिंदगी के बारे में एक बंद किताब है।" (vah apni niji zindagi ke baare mein ek band kitaab hai)
to become crazy or mentally unstable
something that is still being developed or improved
the skill of doing something well
to support or defend someone
to express an idea clearly so that others understand it
to do everything possible to achieve a goal