Quick Definition
ἐνθύμησις, εως, ἡ n.f. inward thought, reflection, thoughts
Strong's Definition
from 1760; deliberation
KJV Usage: device, thought
UBS Dictionary of the Greek New Testament
noun, f. | -εως | θυμός (soul, heart) · θυμόομαι
30.15 · Think · To Think, Thought
thought, what is thought, opinion the content of thinking and reasoning In a number of languages it is simply not possible to find noun-like words for thinking or reasoning and therefore it may be necessary to use a verb equivalent throughout. For example, in LUK 11:17 one may translate as ‘but Jesus knew what they were thinking.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἐνθύμησις, -ews, ἡ, α thinking, consideration: Acts xvii. 29 [A. V. device]; plur. thoughts: Mt. ix. 4; xii. 25; Heb. iv. 12 [here Lmrg.sing.]. (Rare in the classics; Hippoer., Eur., Thuc., Leian.)
Mounce Concise Greek Dictionary
ἐνθύμησις enthumēsis 4x
the act of thought, reflection, Mt. 9:4; 12:25; Heb. 4:12; the result of thought, invention, device, Acts 17:29*
Abbott-Smith Greek Lexicon
** ἐνθύμησις, -εως, ἡ
(< ἐνθυμέομαι), [in Sm.: Jb 21:27, Ez 11:21 * ;]
consideration, pondering (EV, device): Ac 17:29; pl., thoughts, feelings: Mt 9:4 12:25, He 4:12.†
SYN.: ἔννοια, the action of the reason; while ἐνθ. is rather that of the affections (cf. Westc., Heb., l.c.)
Moulton & Milligan — Vocabulary of the Greek NT
ἐνθύμησις. P Lond 46338 (iv/A.p.) (=I. p. 75) καταδεσμεύω δὲ αὐτοῦ τὸν νοῦν καὶ τὰς φρένας τὴν ἐνθύμησιν τὰς πράξεις ὅπως κτλ. ---α magic charm; BGU IV. ro2qiv-!2 (iv/v Α.}.) ποίας δὲ ἔσχεν ἐνθυμήσεις τὸν ἤδη κληθέντα Kal τῆς ἐσχάτης ἐλπίδας (1 —os) ἀποστε[ρ]ῆσαι ; Vett. Val. p. 3015 τὸ ἐξελέγξαι ἀλλοτρίας ἐνθυμήσεις μυστικῶς κατακεχωσμένας.
Liddell-Scott-Jones — Greek-English Lexicon
ἐνθύμησις (enthumēsis) — reflection. ἐνθῡμ-ησις, εως, ἡ, consideration, esteem, [Refs 5th c.BC+]
II. consideration, reflection, [NT+5th c.BC+]
II.2. idea, conception, εἰς ἐ. ἐσθήτων ἦλθον [Refs 4th c.BC+]
III. anxiety, worry, [Refs 5th c.BC+]
IV. resolution, [Refs 4th c.AD+]