Mirth /mɜːrθ/ n. 欢乐
词源: mir- 同merry 欢乐的
后缀:-th 名词后缀(strong--strength)
e.g. The children's faces were beaming with mirth as they played games at the party. 孩子们在派对上玩游戏时脸上洋溢着快乐的笑容。
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