Asseverate

глагол торжественно заявлять, объявлять; клятвенно утверждать Например: They asseverateed that they would never surrender. — Они поклялись, что никогда не сдадутся. Синоним(ы): assert

Большой англо-русский словарь

Asseverate

transitive verb (-ated; -ating) Etymology: Latin asseveratus, past participle of asseverare, from ad- + severus severe to affirm or declare positively or earnestly Example: he always asseverated that he did not know — G. K. Chestertonasseveration nounasseverative adjective

Merriam-Webster's Collegiate Dictionary