A person who enters a place where they are unwelcome.

घुसपैठिया

English Usage: The intruder was caught on the security cameras.

Hindi Usage: घुसपैठिया सुरक्षा कैमरों में पकड़ा गया।

A process or series of actions conducted for a particular purpose.

कार्यवाही

English Usage: The operation to rescue the hostages was successful.

Hindi Usage: बंधकों को बचाने के लिए की गई कार्यवाही सफल रही।