Quick Definition
διαφυλάσσω v. I guard carefully, protect, defend
Strong's Definition
from 1223 and 5442; to guard thoroughly, i.e. protect
KJV Usage: keep
UBS Dictionary of the Greek New Testament
verb | φυλάσσω
21.21 · Danger, Risk, Safe, Save · Cause To Be Safe, Free from Danger
to guard, to protect, to keep safe to guard or protect something in order to keep it safe or free from harm
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
δια-φυλάσσω: 1 aor. inf. διαφυλάξαι; fr. Hdt. down; to guard carefully: twa, Lk. iv. 10 fr. Ps. xe. (xci.) 11. “The seventy chose to employ this term esp. of God’s providential care; ef. Gen. xxviii. 15; Josh. xxiv. 17; Ps. xl. (xli.) 3. Hence it came to pass that the later writers at the close of their letters used to write διαφυλάττοι, διαφυλάξοι ὑμᾶς ὁ θεός, cf. Theodoret. iii. pp. 800, 818, 826, (edd. Schulze, Nosselt, ete. Hal.).” Win. De verb. comp. etc. Pt. v. p. 16.
Mounce Concise Greek Dictionary
διαφυλάσσω diaphylassō 1x
to keep or guard carefully or with vigilance; to guard, protect, Lk. 4:10*
Abbott-Smith Greek Lexicon
δια-φυλάσσω
[in LXX chiefly for שׁמר (as Ps 90 (91):11) ;]
to guard carefully (M, Pr., 116), defend: c. acc, Lk 4:10 (LXX).†
Moulton & Milligan — Vocabulary of the Greek NT
διαφυλάσσω. Winer (αὐ. Grimm s.zv.) remarks that the LXX used this word specially of God's providential care, as in the passage quoted in Lk 4°, its one NT occurrence (= Ps 90 (91)"). It is interesting to compare P Giss I. 177 (time of Hadrian) χάρις τοῖς θεοῖς πᾶσι ὅτι σε διαφυλάσσουσι ἀπρόσκοπον, BGU IY, 10814 (ii/i A.D.) εὔχομαι τοῖς θεοῖς ὑπὲρ] σοῦ, ἵνα σὲ διαφυλά[ξ]ωσι, 26. III. οϑ457 (as emended—iv/a.p.) ἐρρωμένον σε [ὃ θεὸς κ]αθ᾽ ὑπόνοια (1 ὑπόνοιαν) διαφυλάξι ἐν ἀφθοίνητ..] KTA., and the late 7d. Il. 5478 (Byz.) ὁ κύριος τῶν αἰώνων διαφυλάξῃ τὴν ὑμῶν περίβλε(πτον) μεγαλοπρέί( πειαν). Abinnaeus, P Lond 243, 413 (¢. A.D. 346) (ΞΞ 11. pp. 301, 302) end—6 O(€d)s δὲ διαφυλάξῃ oe. The verb is also found in the magical P Lond 12147 (iii/A.p.) (=I. p. 100) ϑιαφυλάξατέ pe τὰ μεγάλα καὶ θαυμαστὰ (ὀνόματα) τοῦ θεοῦ], P Leid W¥-36 (ji/iiia.p.) addressed to a god, διαφύλαξόν pe ἀπὸ πάσης τῆς ἰδίας pov ἀστρικῆς. ‘guard me from all stellar malignity personal to myse!f(?)” (ἡ. 6. due to my own horoscope), 20. Χχν 4 διαφύλαξόν pe ἀπὸ παντὸς φόβου κτλ. It seems fair to claim that quite outside Biblical language the verb was already specialized for divine Two letters addressed by Apamius to guardianship. I]t was capable however of a general meaning. A Doric inser. from Carpathos in CA il. p. 333 has κ]αὶ τὰ φρούρια ἀϊκέραια π]άντα διαφυλάξας τῷ [Sapw. Add OGTS 117° (ii/B.C.) ἐπαγγέλλε[τ]αι δὲ καὶ εἰς τὸ λοιπὸν [τὴ]ν αὐτὴν αἵρεσιν διαφυλάξειν. also A/iche/ 477° (middle ii/B.c.) εἰδότας ὅτι καὶ Στρατονικεῖς τὴν πρὸς ᾿Ασσίους εὔνοια[ν] διαφυλάξουσιν, 20. 508!® (beginning ii/B.C.) προαιρούμενος διαφυλάσσειν τὴν πρὸς τὸ πλῆθος ἡμῶν εὔνοιαν, Sy// 461? (iv/iii B.c.), 64119 (end iii/B.c.), 9185 (iv/iiiB.c.), 5203" (i/B.c.) διεφύλαξαν τὴν πόλιν under arms, and so “ἢ φιλοTipdtepor . . εἰς TO διαφυλάσσειν τὴν πατρίδα.
Liddell-Scott-Jones — Greek-English Lexicon
διαφυλάσσω (diaphulassō) — to protect. διαφῠλάσσω, Attic dialect διαφυλάττω, Cretan dialect διαφυλάδδω (written διαφυλάδω), [Refs]:— watch closely, guard carefully, τὰ τείχεα, τὴν πόλιν, [Refs 5th c.BC+]; especially of providential care, [LXX+2nd c.AD+], etc.:—middle, guard for oneself, πόλιν [Refs 5th c.BC+]
2. observe closely, τὰ μέτρα [Refs 5th c.BC+]
3. observe, maintain, τοὺς νόμους [Refs 5th c.BC+]; εἰρήνην Philipp. cited in [Refs 4th c.BC+]; δ. τὸ μὴ σπουδάζειν guard against being too particular.., [Refs 5th c.BC+]; πλῆθος δ. ὅτι μάλιστα ταὐτὸν αὑτῶν εἶναι take care that.., [Refs]
4. remember, retain, [Refs 2nd c.AD+]