This is the 4627th most frequent Russian word.
дзюдо
Judo (a Japanese martial art focused on throws and grappling).
Here, 'дзюдо' refers to the martial art itself being practiced as an activity.
Он занимается дзюдо уже пять лет.
He has been practicing judo for five years.
In this context, 'дзюдо' describes the type of tournament or competition.
На турнире по дзюдо собрались спортсмены со всего мира.
Athletes from all over the world gathered at the judo tournament.
Here, 'дзюдо' refers to the techniques and principles being taught during a lesson.