The team was enthusiastic about winning the championship.

enthusiastic 是形容词，由名词 enthusiasm（热情）加上后缀 -ic 构成，表示"充满热情的、热心的"。enthusiasm 源自希腊语 enthousiasmos，原指"神灵附体般的狂热"，后来演变为对某事表现出强烈兴趣和热爱的意思。