1. Genuine self-assurance based on true self-knowledge and realistic self-assessment, rather than arrogance or false pretense
She walked into the interview with authentic confidence, having prepared thoroughly and believing in her abilities.
Ela entrou na entrevista com confiança autêntica, tendo se preparado bem e acreditando em suas habilidades.
2. Trust in oneself that is grounded in actual competence and integrity rather than inflated self-image
His authentic confidence came from years of practice and real achievements in the field.
Sua confiança autêntica vinha de anos de prática e realizações reais na área.