asseverate [ə'sevəreɪt]

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vt.郑重声明；（严正地）宣称；断言

state categorically

I will asseverate my conviction that she is guilty. 我坚持有罪判决，因为她是有罪的。
They are explainable as a species of mental atavism. 这些都可以解释为一种精神的返祖现象。