Strong’s Greek
G887 — achlus
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀχλύς
achlus — pronounced akh-looce'
of uncertain derivation; dimness of sight, i.e. (probably) a cataract:--mist.
1 occurrence in the KJV.
Acts 13:11
And now, behold, the hand of the Lord is upon thee, and thou shalt be blind, not seeing the sun for a season. And immediately there fell on him a mist and a darkness; and he went about seeking some to lead him by the hand.