This is the 833rd most frequent Swedish word.
tränaren
"The coach" or "the trainer."
Here, 'tränaren' is used in the definite form to refer to a specific coach who is managing the team's instructions.
Tränaren gav laget nya instruktioner under pausen.
The coach gave the team new instructions during the break.
In this sentence, 'tränaren' again refers to a specific coach who is part of the described scenario.
Efter matchen tackade spelarna tränaren för hans stöd.
After the match, the players thanked the coach for his support.
Here, 'tränaren' is used to identify a specific coach by context as someone with significant experience in coaching.