Quick Definition
παρεισδύω v. I enter secretly
Strong's Definition
from 3844 and a compound of 1519 and 1416; to settle in alongside, i.e. lodge stealthily
KJV Usage: creep in unawares
UBS Dictionary of the Greek New Testament
verb | δύω · δύνω
34.30 · Association · Join, Begin To Associate
to slip into a group unnoticed, to join unnoticed to join surreptitiously with evil intent
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Abbott-Smith Greek Lexicon
* παρ-εισ-δύω
(also -δύνω),
to slip in secretly, steal in: παρεισεδύησαν (vulgar aor.; pass. for act., Bl., § 19, 2), Ju 4 (cf. also MM, xix).†
Moulton & Milligan — Vocabulary of the Greek NT
παρεισδύω. The subst. occurs in P Strass I. 2239 (ii/A.p.) οὐδεμίαν παρείσδυσιν ἔχεις, ἡ γὰρ γ[υν]ὴ ἐν τῇ νομῇ γέγονεν πολλῷ χρόνῳ, ‘you cannot creep in, for the woman has been in possession for a long time”: the sense is just that of Jude 4 2 παρεμβολὴη
Liddell-Scott-Jones — Greek-English Lexicon
παρεισδύνω (pareisdunō) — to infiltrate. παρεισ-δύνω, slip in, penetrate, τὸ ἔλαιον π. [Refs 4th c.BC+] 3: perfect - δέδῡκα, εἰς τὰς ἄλλας διαλέκτους [Refs 2nd c.AD+]:—also παρεισδύω, τὰ παρεισδύοντα τῶν διαλέκτων [Refs]
II. middle παρεισδύομαι, ἐς τὸ στόμα [Refs 5th c.BC+]; [τὸ ὕδωρ] παρεισδυόμενον πνίγει [Refs 4th c.BC+]; of a leech's bite, penetrate into, [Refs 2nd c.AD+]; of customs, [Refs 1st c.AD+]