still-burn

from The Collaborative International Dictionary of English v.0.48

Still-burn \Still"-burn`\, v. t. [imp. & p. p. {still-burnt}or
   {Still-burned}; p. pr. & vb. n. {Still-burning}.]
   To burn in the process of distillation; as, to still-burn
   brandy.
   [1913 Webster]