clearness

Etymology

From Middle English clernesse; equivalent to clear + -ness.

noun

1. (obsolete) Brightness, brilliancy.
2. Mental or sensory distinctness; clarity of understanding, perception etc.
   The daily press is the evil principle of the modern world, and time will only serve to disclose this fact with greater and greater clearness. 6 September 1966, “The Lowest Depths”, in Time
3. The state of being free from obscurities or opacity; distinctness of light, colour etc.
   The clearness of the water meant I could still see the key lying on the river-bed.
4. The state of being free from obstruction or interference.
   The clearness of the path made for an easy hike.