See ↑ FORBID 4, ↑ LAND/GROUND 3, ↑ SQUASH 2
◆◆◆
• ↑ be on dangerous ground/in dangerous territory
• ↑ be thin on the ground
• ↑ break new ground
• ↑ gain ground
• ↑ leave the ground
• ↑ middle ground
• ↑ stand your ground
• ↑ the ground
• ↑ underground/below ground
• ↑ work/drive yourself into the ground