elemental

Short definition from Wiktionary

Adjective

1. 1
   Of, relating to, or being an element (as opposed to a compound).
2. 2
   Basic, fundamental or elementary.
3. 3
   Of the ancient supposed elements of earth, air, fire and water.
4. 4
   Of, or relating to a force of nature, especially to severe atmospheric conditions.

Noun

1. 1
   A creature (usually a spirit) that is attuned with, or composed of, one of the classical elements: air, earth, fire and water or variations of them like ice, lightning, etc. They sometimes have unique proper names and sometimes are referred to as Air, Earth, Fire, or Water.