Make thirsty
• Bake in the sun, say
• Cause to wither
• Dehydrate
• Deprive of water
• Desiccate
• Dry out
• Dry up with heat
• Fail to water
• Get really dry
• Make dry
• Make very dry
• Make very thirsty
• Roast slightly
• Shrivel with heat
• Torrefy