A.give up, surrender treacherously, [καιρὸν] “ἐάν τις ἑκὼν καθυφῇ τοῖς ἐναντίοις καὶ προδῷ” D.19.6, cf. 16.18, al.; “τὰ τῆς πόλεως” Id.58.6, cf. Luc.Prom.5; esp. in a lawsuit, κ. τὸν ἀγῶνα conduct it collusively, compromise it, D.21.151; “οὐ μόνον τῷ μὴ καθυφεῖναι ταῦτα σεμνύνομαι” Id.18.107: abs., καθυφέντων τῶν κατηγόρων when they let the action drop, Id.23.96.
II. Med., καθυφίεσθαί τινι give way, yield, c. dat. pers., X.HG2.4.23; ἔν τινι slacken, “ἐν μάχαις” Polyaen.8.24.1: abs., Luc.Abd.7.
2. Med., with pf. Pass., used trans. like the Act., “εἰ καθυφείμεθά τι τῶν πραγμάτων” D. 3.8; “καθυφεῖντο ἑαυτούς” Plb.3.60.4; “ἐπ᾽ ἀργυρίῳ τὸ τίμημα καθυφειμένος” Plu.Cic.8; “οὐδὲν . . καθυφηκάμην” J.BJ2.16.4; -ίενται τὴν τοῦ “ἑνὸς τιμήν” Ph.2.220.