From a compound of en and thumos; to be inspirited, i.e. Ponder -- think.
see GREEK en
see GREEK thumos
STRONGS NT 1760: ἐνθυμέομαιἐνθυμέομαι, ἐνθυμοῦμαι; a deponent passive; 1 aorist participle ἐνθυμηθείς; from Aeschylus down, with the object now in the genitive now in the accusative; cf. Matthiae, § 349, ii., p. 823; Kühner, § 417 Anm. 9, ii., p. 310; (Jelf, § 485); Krüger, § 47, 11, 1 and 2; (from ἐν and θυμός); to bring to mind, revolve in mind, ponder: τί, Matthew 1:20; Matthew 9:4; to think, to deliberate: περί τίνος, about anything, Acts 10:19 Rec. (So also Wis. 6:16; Plato, rep. 10, p. 595 a.; Isocrates, epistle 9, p. 614, § 9 Bekker) (Compare: διενθυμέομαι.)