Related Clues:

• Simplifies
• Suppresses
• Abates
• Becomes less jammed, as traffic
• Diminishes
• Greases the wheels for, say
• Flows back, as the tide
• Dulls, as pain
• Relieves, as pain
• Moves slowly and carefully
• Becomes less severe
• Flows out
• Eases off
• Mollifies
• Fades out