In a very thorough manner; to the maximum; utmostly; profoundly; properly.
—To burn it all wellthoroughly. They only incinerate the deciduous in Uherport; the coniferous are taken to Blowind or Krentown. (Context: A visitor is describing to Dr∙ Barton how state forestry workers eradicate naturally grown saplings from forests and burn them. Source: J∙ Okram - The Mystery of the Rammed Key.)