Possible Clues:

• Shaky
• Lacking substance or significance
• Where in France tunes composed outside are weak and unconvincing
• Flimsy, thin
• Sketchy note about university we translated into French
• Very slight, with little substance or validity
• You, oh you, will sound fine in tens
• 'King Fog masses his molecules of carbon in squadrons in the city, while he scatters them --ly in the suburbs' (Israel Zangwill)
• Very thin in form, having little validity
• Very slight, insubstantial