This is the 4150th most frequent Japanese word.
ルーレット
Roulette (a casino game or a spinning wheel).
Here, 'ルーレット' refers to the gambling game, used as the subject of the sentence.
カジノではルーレットが人気のゲームです。
Roulette is a popular game in casinos.
In this instance, 'ルーレット' refers to a roulette mechanism being applied in other contexts beyond gambling.
新しいゲームでルーレットの方法を使います。
In the new game, we use the roulette method.
The word 'ルーレット' in this usage indicates the physical spinning wheel mechanism used for decision-making.