This is the 495th most frequent Spanish word.
estadio
Stadium.
The word 'estadio' is used here to refer to a sports stadium, a specific venue for events.
Hoy vamos al estadio para ver el partido.
Today we are going to the stadium to watch the game.
The word 'estadio' is used metaphorically to refer to a stage or phase of development.
El estadio del proyecto está en su fase inicial.
The stage of the project is in its initial phase.
Similar to the previous example, 'estadio' is utilized to describe a phase or stage, in this case, related to health or a process.