torrefy
verb
[ ˈtɒrɪfʌɪ ]
• roast, scorch, or dry (a substance such as an ore, a drug, or a fuel) with heat to drive off all moisture or impurities.
• "torrefying wood loses 30% of the mass but only 10% of the energy"
Origin:
early 17th century: from French torréfier, from Latin torrefacere ‘dry by heat’, from torrere ‘parch, scorch’.
