dreams or plans that are impossible or unrealistic
सपने या योजनाएँ जो असंभव या अवास्तविक हैं (sapne ya yojanayein jo asambhav ya avastavik hain)
"He’s always building castles in the air about his future."
"वह हमेशा अपने भविष्य के बारे में कैसल्स इन द एअर बना रहा है।" (vah hamesha apne bhavishya ke baare mein **castles in the air** bana raha hai)
to start something new that others begin to follow
to keep feelings inside and not express them
start working efficiently or properly
to remove things to tidy a space
a large, reliable, and financially stable company
to join something that is already popular or successful