This is the 636th most frequent Croatian word.
liga
"League" (a group or association for a common purpose, especially sports).
In this context, 'liga' refers to an international level sports competition.
Ove godine sudjeluju u europskoj ligi prvaka.
This year they are participating in the European Champions League.
Here, 'liga' is used to denote a sports league, specifically a football league.
Hajduk je osvojio hrvatsku nogometnu ligu.
Hajduk won the Croatian football league.
Here, 'liga' is used to describe a structured group or association organized around debates within an educational context.