A protestation is a strong declaration that something is true or not true.
例句
Despite his constant protestations of devotion and love, her doubts persisted.尽管他一直宣称对她的爱忠贞不渝，她仍然心存怀疑。
英汉词典释义
n.
(严正的)声明
Despite their protestation, they were glad to accept our help.尽管他们严肃地表明了态度，但他们仍乐于接受我们的援助。
英英词典释义
Noun
1. a formal and solemn declaration of objection;
"they finished the game under protest to the league president""the senator rose to register his protest""the many protestations did not stay the execution"