She couldn't help but let out a triumphant chortle when she saw she had won the game.

chortle 是动词，表示"发出咯咯的笑声"，这个词是英国作家刘易斯·卡罗尔在《爱丽丝镜中奇遇》中创造的合成词，结合了 chuckle（轻声笑）和 snort（喷鼻息）两个词的特点，形容一种既开心又得意的笑声。