sunproof

sun +‎ -proof

sunproof (comparative more sunproof, superlative most sunproof)

1. impervious to the rays of the sun
   • 1606, John Marston, The Wonder of Women:

     There once a charnel-house, now a vast cave,
     Over whose brow a pale and untrod grove
     Throws out her heavy shade, the mouth thick arms
     Of darksome yew, sun-proof, for ever choke

• “sunproof”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• unproofs