sightless

sight +‎ -less

sightless (not comparable)

1. Without sight; blind.
2. Synonym of invisible
   • 1812, John Joseph Henry, An accurate and interesting account of the hardships and sufferings of that band of heroes who traversed the wilderness in the campaign against Quebec in 1775, William Greer, page 201:

     In his return, arriving at a rising ground, a knoll, he heard a rustling of the leaves in his front: an enemy was suspected ; he gathered his men around him, each taking his tree. The enemy was sightless to Boyd, and his party, yet the approach around him was sensible to every one.

   • 1908, The Summary, volume 36, page 72:

     The toiling world is sightless to those who cannot see.

• sightlessly
• sightlessness