1. characterized by lack of confidence in oneself; prone to questioning one's own abilities, decisions, or worth
She felt self-doubting after receiving criticism from her boss.
Ela se sentiu duvidosa de si mesma após receber críticas de seu chefe.
2. expressing or showing uncertainty about one's own capabilities or value
His self-doubting attitude prevented him from pursuing his dreams.
Sua atitude duvidosa de si mesmo o impediu de perseguir seus sonhos.