Possible Clues:

• Weak conciliators must get a report
• There's nothing between sun and dun to make it seem so silent
• Easy to break the silence if it's like this, perhaps
• Not strong or free from defect - perhaps evidence in court
• Damaged
• Not healthy
• Unreliable, not well
• Not reliable, like some evidence
• Peacekeepers, by all one hears, are unreliable...
• A French test of the imperfect