Liddell-Scott-Jones

καταρρήγνυμι (katarrēgnumi) to break down ^G:V

καταρρήγνυμι-ρρήγνῡμι

and καταρρήγνυμιρρηγνύω, future -ρήξω [Refs 5th c.BC+]: late perfect [Refs 2nd c.AD+]:—break down, [Refs 5th c.BC+] [prev. cited]

__2 tear in pieces, rend, [Refs 4th c.BC+]:—middle, κατερρήξαντο τοὺς κιθῶνας they rent their coats, [Refs 5th c.BC+]
__3 metaphorically, τροπὰς καταρρήγνυμιρρήγνυσι[ἡ ἀναρχία] breaks up armies and turns them to flight, [Refs 5th c.BC+]
__4 κ. τινῶν γέλωτας make them burst out laughing, [Refs 2nd c.AD+]
__II passive, especially in aorist κατερράγην[ᾰ], with perfect active κατέρρωγα:—to be broken down, [καταρρήγνυμιρρηγνύμενοι 5th c.BC: Herodotus Historicus 7.23 ">Refs 5th c.BC+]; καταρρήγνυμιρρήγνυσθαι ἐπὶ γῆν to be thrown down and broken, [Refs 5th c.BC+].
__II.2 fall, rush down, of storms, waterfalls, etc., [Refs 5th c.BC+] “Aër.” 8; break or burst out, [καταρρήγνυμιρραγέντες 4th c.BC: Aristoteles Philosophus “de Mundo” 400a26 ">Refs 5th c.BC+]; of tears, [Refs 5th c.BC+]: with genitive, [Refs 2nd c.AD+] (also intransitive in active, of a river, [Refs]; of wind, [Refs 6th c.BC+].
__II.3 to be broken in pieces, Αἴγυπτος μελάγγαιός τε καὶ καταρρήγνυμιρρηγνυμένη with comminuted, crumbling soil, [Refs 5th c.BC+]; to be ruinous, [Refs].
__II.4 in Medicine texts, have a violent discharge, suffer from diarrhoea, [καταρρήγνυμιρρήγνυται ἡ κοιλίη 5th c.BC: Hippocrates Medicus “περὶ ἀρχαίης ἰητρικῇς” 10, compare καταρρήγνυμιρράσσω 11 ">Refs 5th c.BC+]; of persons, [Refs 5th c.BC+].
__II.4.b of menstruation, τοῖς θήλεσιν.. τὰ καταρρήγνυμιμήνια κ. [Refs 4th c.BC+]
__II.5 of tumours, break, burst, [Refs 5th c.BC+]
__II.6 of parts of the body, fall in, collapse, οἵ τε μαζοὶ καὶ τὰ ἄλλα μέλεα κ. [Refs] flat-chested, [Refs 4th c.AD+]; of the lips or tongue, to be fissured, [Refs 2nd c.AD+]