overconfidence

noun

Meaning

Excessive belief in one's own abilities or judgment, often leading to a disregard for potential risks.

Examples

  • His overconfidence in the stock market led him to invest his entire life savings in a single volatile tech company.
  • The team's overconfidence after winning the first three games caused them to underestimate their opponent in the final match.

Synonyms: arrogance, hubris, conceit, presumption