Lexical Definition

‎κνήθω‎ knḗthō (knay'-tho) to itch ^G:V
from a primary (to scrape)

X itching.

• to scratch, i.e. (by implication) to tickle

Abbott-Smith

* κνήθω (late form of κνάω),
1. to scratch.
2. to tickle; pass., to itch: II Ti 4:3.†

Abbott-Smith References

Liddell-Scott-Jones

κνήθω-ω,

later form of κνάω, scratch, ὡς λέγεται, κνήθωειν οἶδεν ὄνος τὸν ὄνον [Refs 2nd c.AD+] —middle, κνήθωεσθαι εἰς τὰς ἀκάνθας τὰ ἕλκη to get one's sores scratched, [Refs 4th c.BC+]

__2 passive, itch, Paul.[NT]; to be provoked, [Refs 4th c.BC+]

_{LSJ Scripture Refs: 2Tim.4.3}