Strong’s Greek
G2833 — knetho
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
κνήθομαι
knetho — pronounced knay'-tho
from a primary knao (to scrape); to scratch, i.e. (by implication) to tickle:--X itching.
1 occurrence in the KJV.
2 Timothy 4:3
For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears;