What does "self-confidence" mean?

The state or degree of being self-confident: believing in one's own abilities.

What is a synonym for "self-confidence"?

Common synonyms include: self-assurance, aplomb, arrogance, assurance, assurance, assuredness.

noun

noun ·4 syllables ·Moderate ·College level

Noun

1
The state or degree of being self-confident: believing in one's own abilities. uncountable, usually
2
freedom from doubt; belief in yourself and your abilities wordnet

"I'm considering taking a gap year to develop myself and increase my self-confidence."

From self- + confidence.