snowproof

From snow +‎ -proof.

snowproof (comparative more snowproof, superlative most snowproof)

1. Resistant to snow.
   • 1847, James Hogg, Titan:

     ...that he looked quite like a gentleman bound on a shooting expedition, and that his friends had every reason to think he would now be snowproof.

   • 1915, Archer Eben Knowlton, Standard Handbook for Electrical Engineers:

     Care should be taken to make windows rain- and snowproof, and to allow opening for ventilation without letting in rain during ordinary storms.

   • 2007, Lynn Brunelle, Mama's Little Book of Tricks:

     Make a Snow Angel. What You Need: Snow (deep enough to flop into), your body (preferably covered in snowproof clothes).

snowproof (third-person singular simple present snowproofs, present participle snowproofing, simple past and past participle snowproofed)

1. (transitive) To make resistant to snow.