He couldn't hide his glee when he saw his opponent fall into the muddy puddle.

glee 是名词，意思是"欢欣、狂喜"，特别是指因为看到别人倒霉或失败而感到的快乐，常带有幸灾乐祸的意味。这个词源自古英语，原本指"音乐、欢乐"，后来发展出"因他人不幸而高兴"的含义。