prude
/pru:d; prud/ n (derog 贬) person who behaves in an extremely or unnaturally proper manner, esp one who is (too) easily shocked by sexual matters 极端或过分拘谨的人; （尤指对性问题）大惊小怪的人
She was such a prude that she was even embarrassed by the sight of naked children. 她正经得出了格, 甚至见了赤身露体的孩子也难为情.