sightproof

• sight-proof

From sight +‎ -proof.

• IPA^(key): /ˈsaɪtpɹuːf/

sightproof (not comparable)

1. invisible; not able to be seen
   • 1871, James Russell Lowell, “My Garden Acquaintance”, in My Study Windows, Boston, Mass.; New York, N.Y.: James R[ipley] Osgood and Company, late Ticknor & Fields, and Fields, Osgood, & Co., →OCLC, page 12:

     As it was, whenever the yellowbirds came back, their enemies were hidden in their own sight-proof bush.

   • 1959, Carol J. Dyson, AIA, Louvers in extruded aluminum, Construction Specialties, Inc., page 6:

     This louver may also be used where a sightproof louver is desired.

   • 1975, Randall Bassett, “three defense strategies and how to use them” (chapter 6), in Zen karate, New York: Warner Books, →ISBN, factor no. 2: physical vulnerability, page 72:

     There is no more perfect place for a mugger to catch you than in an almost soundproof, sightproof apartment entranceway as you are fumbling with your keys or reaching for your mail.

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