1. Expressions (phrases, clauses, etc.), Suru verb - special class

   to risk one's life (to do); to put one's life on the line

   usu. as 身を挺して

2. to step forward (to do); to give one's all

   usu. as 身を挺して

Also written 身をていする【みをていする】miwoteisuru、身を呈する【みをていする】miwoteisuru