overconfidently

/ˌoʊvərˈkɑnfɪdəntli/
adverb
  1. In a way that shows too much belief in one's own abilities or chances of success.
    • He overconfidently walked into the exam without reviewing any notes.
    • She overconfidently claimed she could finish the project in one day.
    • The driver overconfidently sped through the curve and lost control.
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