1. to gradually build or increase one's belief in one's own abilities, judgment, and worth
She worked hard to develop self-confidence after years of self-doubt.
Ela trabalhou muito para desenvolver autoconfiança após anos de dúvidas sobre si mesma.
2. to acquire greater assurance and trust in oneself through practice and experience
Athletes develop self-confidence through consistent training and competition.
Os atletas desenvolvem autoconfiança através de treinamento consistente e competição.