The door is self-locking.

He is a self-made millionaire.

He is self-opinionated and never listens to others.

He wallowed in self-pity after his failure.

She painted a beautiful self-portrait.

She remained self-possessed even in the face of adversity.

She handled the situation with self-possession and calmness.

Self-preservation is a natural instinct.

She is a self-reliant person who can handle any situation on her own.

A self-respecting person knows their worth and stands up for themselves.