καταδύω or -δύνω act. pres. καταδύνω mid. καταδύομαι fut. -δύσομαι aor1 mid. -εδῡσάμην Epic 2nd sg. -δύσεο 3rd sg. -δύσετο aor2 act. κατέδυν perf. καταδέδῡκα intr., in act. pres. καταδύνω and mid. καταδύομαι:— to go down, sink, set, of the sun, ἠέλιος κατέδυ Il.; ἐς ἠέλιον καταδύντα till sun set, Od.; of ships, to be sunk or rather to be disabled (v. infr. II), Hdt., Thuc.:—of persons, καταδεδυκώς having popped down, Ar. to go down into, plunge into, c. acc., καταδῦναι ὅμιλον, μάχην, δόμον, πόλιν Hom.; foll. by a prep., καταδυσόμεθʼ εἰς Ἀΐδαο δόμους we will go down into . . , Od., etc.:—with a notion of secresy, to insinuate oneself, steal into, Plat. to slink away and lie hid, καταδύομαι ὑπὸ τῆς αἰσχύνης Xen. to get into, put on, τεύχεα Hom. Causal, to make to sink, Lat. submergere, ἐμὲ καταδύουσι τῷ ἄχει Xen.; mostly in aor1, τοὺς γαυλοὺς καταδύσας Hdt.; καταδῦσαι ναῦν to cut it down to the waterʼs edge, disable it, Hdt., Thuc.