1. A belief in one's abilities, success, or the truth of something that lacks a solid basis in fact or evidence
His unfounded confidence in his abilities led to a poor performance on the exam.
Sua confiança infundada em suas habilidades resultou em um desempenho ruim no exame.
2. Excessive self-assurance not supported by adequate proof, knowledge, or experience
The startup's unfounded confidence in their business model caused them to fail within a year.
A confiança infundada da startup em seu modelo de negócios os levou ao fracasso em um ano.