unpollutable
English
Etymology
From un- + pollutable.
Adjective
unpollutable (not comparable)
- Not pollutable; resistant to pollution.
- 1908 January 4, John Muir, “The Hetch Hetchy Valley”, in Sierra Club Bulletin[1], volume VI, number 4:
- "Hetch Hetchy water is the purest, wholly unpolluted, and forever unpollutable."