Strong's Concordance
Original word: כָּהָה
Transliteration: kahah
Definition (short): darken
Definition (full): to be weak, to despond, to grow dull
Strong's Exhaustive Concordance
A primitive root; to be weak, i.e. (figuratively) to despond (causatively, rebuke), or (of light, the eye) to grow dull -- darken, be dim, fail, faint, restrain, X utterly.
References
KJV:
And it came to pass, that when Isaac was old, and his eyes were dim, so that he could not see, he called Esau his eldest son, and said unto him, My son: and he said unto him, Behold, here am I.
NASB:
Now it came about, when Isaac was old and his eyes were too dim to see, that he called his older son Esau and said to him, "My son." And he said to him, "Here I am."
KJV:
And Moses was an hundred and twenty years old when he died: his eye was not dim, nor his natural force abated.
NASB:
Although Moses was one hundred and twenty years old when he died, his eye was not dim, nor his vigor abated.
KJV:
For I have told him that I will judge his house for ever for the iniquity which he knoweth; because his sons made themselves vile, and he restrained them not.
NASB:
"For I have told him that I am about to judge his house forever for the iniquity which he knew, because his sons brought a curse on themselves and he did not rebuke them.