asseveration

/əˌsɛvəˈreɪʃən/
noun
  1. A strong, serious statement or declaration that something is true.
    • Her repeated asseveration that she would finish the project on time finally reassured the team.
    • The witness's asseveration under oath convinced the jury of the defendant's innocence.
    • Despite his confident asseveration, no one believed he had seen a ghost.
Antonyms
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