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 start something that causes many unforeseen problems
to reconnect later to get an update
to cause a sudden failure; to interrupt a process abruptly
to admit or confess to something.
in a risky or dangerous situation
something that seems promising at first but fails to deliver