Quick Definition
σύμφημι v. I assent to
Strong's Definition
to say jointly, i.e. assent to
Derivation: from G4862 (σύν) and G5346 (φημί);
KJV Usage: consent unto
UBS Dictionary of the Greek New Testament
verb | φημί
31.16 · Hold a View, Believe, Trust · Agree, Consent
to agree with, to assent to to give assent to a particular proposition In a number of languages the equivalent of ‘to give assent to’ is simply ‘to say Yes to.’ In other instances it may be important to introduce direct discourse, for example, ‘to say, I agree.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
σύμ-φημι [Τ WH σύν- (cf. σύν, II. fin.)]; to consent, confess: τινί foll. by ὅτι, Ro. vii. 16. (Tragg., Xen., Plat.)
Mounce Concise Greek Dictionary
σύμφημι symphēmi 1x
pr. to agree with, Rom. 7:16*
Abbott-Smith Greek Lexicon
* σύν-φημι (Rec. συμ-), to consent, confess: c. dat., seq. ὅτι, Ro 7:16.†
Liddell-Scott-Jones — Greek-English Lexicon
σύμφημι (sumphēmi) — to agree. σύμφημι, future -φήσω[Refs 5th c.BC+]: aorist 1 συνέφησα [Refs]aorist 2 συνέφην frequently in [Refs 5th c.BC+]:—assent, approve, or agree fully, [Refs 5th c.BC+]
2. with accusative of things, concede, agree to, grant, ταῦτα.. πάντες ἄρα συνέφασαν [Refs 5th c.BC+] (σοι) I grant you, [Refs 5th c.BC+]; frequently in Platonic dialogue, σύμφαθι ἢ ἄπειπε say yes or no,[Refs]
3. with accusative et infinitive, agree that.., [Refs 5th c.BC+]; σ. τῷ νόμῳ ὅτι καλός, ={σ. τὸν νόμον καλὸν εἶναι}, [NT]
4. with infinitive future, promise, [Refs 5th c.BC+]