Quick Definition
I dissemble with
Strong's Definition
to act hypocritically in concert with
Derivation: from G4862 (σύν) and G5271 (ὑποκρίνομαι);
KJV Usage: dissemble with
Thayer's Greek Lexicon
συνυποκρίνομαι: 1 aorist passive, συνυπεκριθην, with the force of the middle (cf. Buttmann, 52 (45)); to dissemble with: τίνι, one, Gal_2:13. (Polybius 3, 92, 5 and often; see Schweighaeuser, Lex. Polybius, p. 604; Plutarch, Marius, 14, 17.)
Mounce Concise Greek Dictionary
συνυποκρίνομαι synypokrinomai 1x
to dissemble, feign with, or in the same manner as another, join in the playing of the hypocrite, Gal_2:13
Abbott-Smith Greek Lexicon
† συν -υπο -κρίνομαι ,
to play a part with, dissemble with: c . dat ., Gal_2:13 ( Polyb .).†
Moulton & Milligan — Vocabulary of the Greek NT
συνυποκρίνομαι [page 615]
συνυποκρίνομαι is generally understood in the sense play a part with : cf. Aristeas 267 τὸ πρέπον ἑκάστῳ συνυποκρινόμενος , acting the proper part towards each. But a different meaning has been found in Polyb. iii. 92. 5, where it is said of Fabius Cunctator that (having no intention of giving battle) συνυπεκρίνετο τοῖς προθύμως καὶ φιλοκινδύνως διακειμένοις , he pretended to agree with the eager and adventurous spirits. This makes good sense in Gal_2:13 : the other Jews pretended to agree with Peter, though they really did not.
Liddell-Scott — Intermediate Greek Lexicon
συνυποκρίνομαι Dep. "to play a part along with" others: "to help" another "in maintaining" a thing, Plut.
STEPBible — Tyndale Abridged Greek Lexicon
συν-υπο-κρίνομαι
to play a part with, dissemble with: with dative, Gal.2:13 (Polyb.).†
(AS)