Strong’s Greek
G4652 — skoteinos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
σκοτεινός
skoteinos — pronounced skot-i-nos'
from 4655; opaque, i.e. (figuratively) benighted:--dark, full of darkness. see GREEK for 4655
3 occurrences in the KJV.
Matthew 6:23
But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness!
Luke 11:34
The light of the body is the eye: therefore when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness.
Luke 11:36
If thy whole body therefore be full of light, having no part dark, the whole shall be full of light, as when the bright shining of a candle doth give thee light.