expression, godan verb (-ru)
put one's body on the line; risk oneself; devote oneself wholeheartedly
Used when someone physically risks their safety or health for a cause, task, or person. Can also imply intense dedication without literal danger.
彼はチームのために体を張ってプレーした。
He played putting his body on the line for the team.
消防士は人を救うために体
Firefighting is a job where you risk your life to save people.