/sɛlf dɪˈfɛns/ – Noun
Definition: sự tự vệ.
A more thorough explanation: Self-defence is a legal doctrine that allows an individual to use reasonable force to protect themselves from harm or injury when faced with an imminent threat of violence. It is a recognized justification for the use of force in situations where there is a genuine and reasonable belief that such force is necessary to defend oneself.
Example: The defendant claimed that he acted in self-defence when he struck the intruder with a baseball bat.