Strong's Concordance

Original word: κνήθω
Transliteration: knéthó
Definition (short): tickled
Definition (full): to scratch, itch

NAS Exhaustive Concordance

Word Origin: a late form of knaó (to scrape)
Definition: to scratch, itch
NASB Translation: tickled (1).
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Strong's Exhaustive Concordance

From a primary knao (to scrape); to scratch, i.e. (by implication) to tickle -- X itching.
KJV: 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;
NASB: For the time will come when they will not endure sound doctrine; but wanting to have their ears tickled, they will accumulate for themselves teachers in accordance to their own desires,