This is the 4136th most frequent Japanese word.
ライバル
Rival.
In this sentence, 'ライバル' refers to a competitor or opponent in sports.
彼はスポーツでのライバルだ。
He is my rival in sports.
Here, 'ライバル' signifies a competitor in the professional sphere or career.
仕事の分野で彼女は私のライバルです。
She is my rival in the field of work.
In this context, 'ライバル' is used to describe an opposing team in a competitive activity or sport.