Quick Definition
συμπαθέω v. I sympathize with, have compassion on
Strong's Definition
from 4835; to feel "sympathy" with, i.e. (by implication) to commiserate
KJV Usage: have compassion, be touched with a feeling of
UBS Dictionary of the Greek New Testament
verb | πάσχω
24.80 · Sensory Events and States · Pain, Suffering
to suffer with, to share in the sufferings of to suffer along with someone else It is, however, possible to interpret συμπαθέω in HEB 10:34 as referring primarily to sympathy rather than actual sharing or suffering.
25.57 · Attitudes and Emotions · Love, Affection, Compassion
to be sympathetic toward, to have sympathy for to share someone’s feeling in the sense of being sympathetic with In a number of languages the closest equivalent of ‘being sympathetic with’ may be ‘to understand completely how one feels’ or ‘to feel in one’s heart just like someone else feels.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
συμ-παθέω [TWH συν- (cf. σύν, II. fin.)], -@: 1 aor. συνεπάθησα; (συμπαθής); a. lo be affected with the same feeling as another, to sympathize with, (Aristot., Plut.). b. in reference to the wretched, to feel for, have compassion on, (Vulg. compatior) : τινί, Heb. iv. 15 [A. V. to be touched with the feeling of]; x. 34, (Isocr. p. 64 b.; Dion. Hal., Plut.).
Mounce Concise Greek Dictionary
συμπαθέω sympatheō 2x
to sympathize with, Heb. 4:15; to be compassionate, Heb. 10:34*
Abbott-Smith Greek Lexicon
** συν-παθέω
(Rec. συμπ-), -ῶ, [in LXX: IV Mac 5:25 AR 13:23 * ;]
to have a fellow feeling for or with, sympathize with or in: c. dat. rei, He 4:15; dat. pers., ib. 10:34 (Arist., Plut., al.).†
Liddell-Scott-Jones — Greek-English Lexicon
συμπαθέω (sumpatheō) — to sympathize. συμπαθ-έω, to be sympathetically affected, δοκεῖ ἡ ψυχὴ καὶ τὸ σῶμα συμπαθεῖν ἀλλήλοις [Refs 4th c.BC+]:—passive, [Refs 1st c.AD+]
2. with dative person, sympathize with, τοῖς φίλοις [Refs 4th c.BC+]
3. with dative of things, sympathize in, feel for, ἀτυχίαις [NT+5th c.BC+]
4. absolutely, feel sympathy, [Refs 1st c.AD+]; ἐκ τοῦ παθεῖν γίγνωσκε καὶ τὸ συμπαθεῖν· καὶ σοὶ γὰρ ἄλλος συμπαθήσεται παθών (future middle in active sense) [Refs 4th c.BC+]