This is the 1103rd most frequent Japanese word.
連盟
"連盟" means "league" or "union," referring to an association or alliance of individuals or groups.
In this sentence, '連盟' refers to an organized association or league formed by nations collaborating for peace.
国際連盟は世界平和のために設立されました。
The League of Nations was established for world peace.
Here, '連盟' is used to describe an organization or association related to activities, specifically sports.
私たちのスポーツ連盟は新しい大会を開催します。
Our sports league will organize a new tournament.
'連盟' in this example refers to a professional association or league of scientists uniting for a cause.