παρεισδύνω G3921
pareisdýnō · par-ice-doo'-no · Verb
from παρά and a compound of εἰς and δύνω; to settle in alongside, i.e. lodge stealthily:--creep in unawares.
1 Occurrence in the King James Bible
Jude 1:4For there are certain men crept in unawares, who were before of old ordained to this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ.