He chose suicide.

He is dealing with the problem of social withdrawal.

This hermit crab can perform autotomy when it senses danger, allowing it to escape from enemies.

This self-propelled lawnmower is very convenient.

She takes good care of her natural nails and never neglects them.

She often posts selfies on Instagram.

He took an oath to himself to succeed.

He made a self-oath to achieve his goals.

He performs his own sadhana every day.

He became aware and admitted his own mistakes.