Self-esteem (noun)

1. Confidence in one's own worth or abilities; self-respect.
2. The sense of one's own value as a person.

Origin:

Late 19th century: coined by w. james.

Examples:

1. She has high self-esteem.
2. He struggled with low self-esteem.
3. She had to work hard to improve her self-esteem.
4. His self-esteem was damaged by the criticism.
5. She had to build her self-esteem after the break-up.