suru verb (special), transitive verb
put oneself forward; risk one's life; volunteer bravely
Almost exclusively used in the set phrase 身を挺する, meaning to risk one's own safety or position for a cause. Not used freely as a standalone verb.
See also: 身を挺する
彼は身を挺して子供を救った。
He risked his life to save the child.
社長は身を挺して改革を進めた。
The president put himself on the line to push through reforms.