Quick Definition
ἐπιμαρτυρέω v. I testify earnestly
Strong's Definition
from 1909 and 3140; to attest further, i.e. corroborate
KJV Usage: testify
UBS Dictionary of the Greek New Testament
verb | μαρτυρέω
33.262 · Communication · Witness, Testify
to witness to provide information about a person or an event concerning which the speaker has direct knowledge In a number of languages it is necessary to indicate specifically what is the content of a witness, so that, for example, in LUK 21:13 it may be necessary to say ‘this is your chance to witness to the good news’ or ‘... to tell about the good news’ or ‘... to tell what you yourselves know about the good news.’
1 It is possible that ἐπιμαρτυρέω is somewhat more specific or emphatic in meaning than μαρτυρέω[a], but this cannot be determined from NT contexts.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἐπι-μαρτυρέω, -@; 10 bear witness to, establish by testimony: foll. by the ace. with inf., 1 Pet. v.12. (Plato, Joseph., Plut., Leian., al.) [Comp.: συν-επιμαρτυρέω.
Mounce Concise Greek Dictionary
ἐπιμαρτυρέω epimartyreō 1x
to bear testimony to; to testify solemnly, 1 Pet. 5:12*
Abbott-Smith Greek Lexicon
* ἐπι-μαρτυρέω, -ῶ to bear witness to: c. acc et. inf., I Pe 5:12,†
Moulton & Milligan — Vocabulary of the Greek NT
ἐπιμαρτυρέω. For this verb = ‘‘ bear witness to,” which is found in the NT only in 1 Pet 512, cf. Ρ Leid W**iv-1 (ii/iii A.D.) émμαρτυροῦντος μηδενὸς κακοποιοῦ Κρόνου, The stronger form ἐπιμαρτύρομαι (cf. 1 Macc 258) occurs e.g. in P Petr II. 17 (3)1} οὐδ᾽ ἐπεμαρτύρατό pe ’A., ‘neither did A. appeal to me,” P Grenf I. 3815 (ii/i B.c.) περὶ ὧν (particulars of an assault) τοὺς παρόντας ἐπεμαρτυράμην, “1 called those present to witness.” P Hib I. 417° (c. B.c. 261) ἐπιμέλειαν δὲ ποίησαι, “be careful,’” BGU IV. 110678 (B.c. 13) ποιεῖσθαι. . . [τοῦ] παιδίου προσήκουσαν ἐπιμέληαν, of a nurse, P Amh 11. 6413 (A.D. 107) @]@érouvs . . κ[αὶ] μὴ ἀναλογοῦντας τὴν ἐ[πΊ]ι| μέλειαν, ‘inefficient and incapable of doing their duties ἡ | (Edd.), P Oxy I. 582% (a.p. 288) αἱ ταμιακαὶ οὐσίαι τῆς
Liddell-Scott-Jones — Greek-English Lexicon
ἐπιμαρτυρέω (epimartureō) — to testify to. ἐπιμαρτῠρ-έω, bear witness to a thing, depose to, ἐ. ἡμῖν τὰ ὀνόματα μὴ.. κεῖσθαι 5th-6th c.BC: Plato Philosophus “Cratylus” 397a; ἐ. τι πρός τινας 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Lysander” 22; τὰ χρήματα ἅ κα ἐπιμαρτυρήσωντι of which they admit the possession, [Refs]: with infinitive, τῶν πραγμάτων -ούντων τὴν δύναμιν αὐξάνεσθαι [NT+1st c.AD+]:— passive, to be confirmed by evidence, [Refs]
2. bear witness in favour of, τινί 1st c.BC: Philodemus Philosophus “περὶ οἰκονομίας” p.57J.
II. Astrology texts, support by aspect, [Refs 2nd c.AD+]
III. in middle, adjure, τισὶ μὴ ποιέειν τι 5th c.BC: Herodotus Historicus 5.93 (as variant for{ἐπιμαρτύρομαι}).