Quick Definition
βαθύς, εῖα, ύ Adj deep, early, profound
Strong's Definition
from the base of 939; profound (as going down), literally or figuratively
KJV Usage: deep, very early
UBS Dictionary of the Greek New Testament
adjc. | -εῖα, -ύ | βαθύνω
81.10 · Spacial Dimensions · High, Low, Deep
deep pertaining to being considerably below a surface
78.22 · Degree · Much, Little [Positive-Negative Degree]
extremely, exceedingly great, very very an extreme point on a scale of extent
28.76 · Know · Not Able To Be Known, Secret
Collocation: τὰ βαθέα
deep secrets, secrets difficult to find out about (figurative extension of meaning of βαθύς[a] ‘deep,’ 81.10) the content of knowledge which is very difficult to know Only rarely can one use a literal rendering of τὰ βαθέα or τὰ βάθη in referring to secrets. In some instances it may be possible to use an expression such as ‘far away’ or ‘distant,’ and in other cases one can use expressions meaning ‘hard’ or ‘difficult.’ More often than not, however, the closest equivalent of τὰ βαθέα and τὰ βάθη in this type of context is either an expression of degree using a term such as ‘very’ (for example, ‘that which is very secret’) or an expression implying ‘that which is hidden’ or ‘that which is difficult to discover.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
βαθύς, -εἴα, -v, [cf. βάθος, deep; prop.: Jn. iv. 11. metaph.: ὕπνος, a deep sleep, Acts xx. 9 (Sir. xxii. 7; often also in Grk. writ.) ; ὄρθρος (see βαθέως), Lk. xxiv. 1 ([Arstph. vesp. 216]; Plat. Crito 43 ἃ. ; Polyaen. 4, 9, 1; ἔτι βαθέος ὄρθρον, Plat. Prot. 310 a. [cf. also Philo de mutat. nom. ὃ 30; de vita Moys. i. § 32]); τὰ βαθέα τοῦ Σατανᾶ, Rey. ii. 24 (G 1, Τ Tr WH; ef. βάθος).
Mounce Concise Greek Dictionary
βαθύς bathus 4x
deep, Jn. 4:11; met. deep, profound, Acts 20:9; Rev. 2:24; ὄρθρου βαθέος, lit. at deep morning twilight, at the earliest dawn, Lk. 24:1*
Abbott-Smith Greek Lexicon
βαθύς (gen. -έως, vernac., Lk 24:1; Bl., § 8, 5), -εῖα, -ύ,
[in LXX chiefly for עמק;]
deep; Jo 4:11; metaph., ὄρθρου βαθέως (v. supr.), early dawn, Lk 24:1; ὕπνος, Ac 20:9; τὰ β. τοῦ Σατανᾶ, Re 2:24.†
Moulton & Milligan — Vocabulary of the Greek NT
βαθύς. For B. associated with time (class.), as in Lk 24}, cf. P Lips 1. 4o¥- 10 (iv/v A.p.) ὀψὲ πάνν βαθ[ε]ίας ἑσπέρ[ας. So in the fragment of an epithalamium (iv/a.D.), P Ryl I. 17®&— ὁμοφροσύνην δ᾽ ὀπάσε[ιε ἤδη που θεὸς ἄμμι καὶ αὐτίκα τέκνα γενέϊσ7θαν καὶ πα[ίδων παῖδας καὶ ἐς βαθὺ γῆρας ἱκέσθ[αι. It is applied to colour in P Lond 899* (ii/A.p.) (= IIL. p. 208) τὸ οὖν βαθύτερον (sc. πορφύριον) πεποίηται εἰς TO σπανου (?) καὶ τὸ ὀξύτερον εἰς τί] ἄλλ[ο]. The comparative βαθύτερον is also found P Petr III. 43 (2) γεεζοῖν. 18 (B.C. 245) (p. 121). Note a new compound, recalling the combination in Lk 643, P Hal I. 1-8 (iii/B.c.), where a πολιτικὸς νόμος is headed φυτίεύσ]εως kal οἰκοδομ[ίας] kal β[αθ]νορυί γῆς.
Liddell-Scott-Jones — Greek-English Lexicon
βαθύς (bathus) — deep. βᾰθύς, βαθεῖα Ionic dialect βαθέᾰ, βαθύ; feminine βαθύς [Refs 3rd c.BC+]; genitive βαθέος, βαθείας Ionic dialect βαθέης: dative βαθέϊ, βαθείῃ Ionic dialect βαθέῃ: comparative βαθύτερος, poetry βαθίων [ῑ Attic dialect, ῐ [Refs 3rd c.BC+]:—deep or high, accusative to one's position, [Refs 8th c.BC+]; βαθέης ἐξάλλεται αὐλῆς a court within a high fence, [Refs 8th c.BC+]; ἠϊόνος προπάροιθε βαθείης the deep, i.e. wide, shore, [Refs 8th c.BC+]; κύλικες [Refs]; βαθὺ πτῶμα a fall from a high rock, [Refs 4th c.BC+]; πλευρὰ βαθυτάτη (vulgar form βαρυτάτη), of an athlete, [Refs 5th c.BC+]; of a line of battle, βαθύτεραι φάλαγγες [Refs 5th c.BC+]; β. τομή, πληγή, a deep cut, [Refs 1st c.AD+]
2. deep or thick in substance, of a mist, ἠέρα βαθεῖαν [Refs 8th c.BC+]; of sand, ἀμάθοιο βαθείης [Refs 8th c.BC+]; of ploughed land, νειοῖο βαθείης [Refs 8th c.BC+]; β. γῆ, opposed to to stony ground, [Refs 5th c.BC+]; of luxuriant growth, deep, thick, of woods, etc., βαθείης τάρφεσιν ὕλης [Refs 8th c.BC+]; χαίτη, τρίχες, πώγων, [Refs 7th c.BC+]
2. b deep, of colour, [Refs]: comparative, [Refs 2nd c.AD+]
3. of quality, strong, violent, βαθείῃ λαίλαπι [Refs 8th c.BC+]
3. b generally, copious, abundant, β. κλᾶρος [Refs 5th c.BC+]; β. ἀνήρ a rich man, [Refs 5th c.BC+]; β. χρέος deep debt, [Refs 5th c.BC+]; β. ὕπνος deep sleep, [Refs 3rd c.BC+]
4. of the mind, ἄχος ὀξὺ κατὰ φρένα τύψε β. in the depths of his soul, [Refs 8th c.BC+]; but also, profound, φρήν [Refs 5th c.BC+]; βαθύτερα ἤθη more sedate natures, [Refs 5th c.BC+] (but, more recondite, i.e. civilized, manners, [Refs 5th c.BC+]: of persons, deep, wise, β. τῇ φύσει στρατηγός [Refs 3rd c.BC+]; also, deep, crafty, [Refs 4th c.BC+]
5. of time, β. ὄρθρος dim twilight, [Refs 5th c.BC+]; β. νύξ a late hour in the night, [Refs 5th c.BC+]; β. γῆρας conjecture in [Refs 5th c.BC+]
II. adverb -έως[Refs 3rd c.BC+]; profoundly, [Refs 5th c.BC+]: superlative βαθύτατα, γηρῶν [Refs 2nd c.AD+]