Original: Ground fighting (in martial arts sometimes referred to as "ground work" or "ground game") is hand-to-hand combat which takes place while the combatants are on the ground, generally involving a degree of grappling.
Simplified: Ground fighting (in martial arts sometimes referred to as "ground work" or "ground game") is hand-to-hand combat which takes place while the fighters are on the ground, generally involving a degree of clutching of gripping.