basic material (noun) raw material: natural resources
Sinonime: arduous, bloodthirsty, bloody, bloody-minded, brutal, criminal, cruel, cutthroat, dangerous, deadly, destroying, destructive, devastating, exhausting, fell, ferocious, harrowing, hellish, homicidal, killing*, lethal, ruinous, sanguinary, sanguineous, sapping, savage, strenuous, unpleasant