How to Say "overconfident" in Spanish
The Spanish word for “overconfident” is “confiado” — B2 level.
English → SpanishB2
adjectiveB2
too sure of oneself

Examples
No seas tan confiado, ese hombre podría estar mintiendo.
Don't be so naive/trusting, that man could be lying.
Perdieron el juego por estar demasiado confiados.
They lost the game because they were overconfident.
The Negative Twist
Context is key. If you tell someone 'eres un confiado,' it's often a bit of a criticism, suggesting they believe people too easily.
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