Lexical Definition

‎ἐνθύμησις‎ enthýmēsis (en-thoo'-may-sis) reflection ^G:N-F
from ‎ἐνθυμέομαι‎

device, thought.

• deliberation

Abbott-Smith

** 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.)

Abbott-Smith References

Liddell-Scott-Jones

ἐνθύμησις-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+]

_{LSJ Scripture Refs: Matt.9.4 ☩ LXX.Job.21.27}