英语谜语Long long ago,there's a prince who loved a princess.But

英语谜语
Long long ago,there's a prince who loved a princess.But he was under a curse that he could only say one word to her every year.
After nine years,he could express his love with a sentence"My dear,I love you,will you marry me?"
He was anxious to know the princess's responses.But she just said one word which almost made the prince spit out blood.What's that?
(在一个博客里看到的 可是没看到答案 实在是很好奇...)