heath
noun /hiːθ/
  /hiːθ/
 [countable, uncountable]- a large area of open land that is not used for farming and is covered with rough grass and other small wild plants
- on the heath Wild ponies roam free on the heath.
 - The marshland gave way to heath and sandy scrub.
 
Word OriginOld English hǣth, of Germanic origin; related to Dutch heide and German Heide.