self-defence

(of a machine) That starts by itself. / (of a person) Energetic and resourceful.

Mindful of, or promoting, only one's own interests. / (military, of a missile, not comparable) That searches for a target automatically.

The selfish promotion of one's own interests.

A self-seeking person.

The regulation (by a person or an organization) of their own behaviour without external control or monitoring.

Causing injury to oneself or harm to one's interests.

The disparagement of one's own self.

Knowledge or insight into one's own nature and abilities.

The instinctive behaviour that protects oneself from harm.