He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.

He holds a personal grudge against me.

Using the private railway makes commuting very convenient.

He is too self-conscious, so he has difficulty speaking in public.

He should stop his selfish behavior.

He studies in the library every day for self-improvement.

She emphasized the importance of self-determination.

He should stop his self-destructive behavior.

The robot initiated the self-destruction program.