Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
καταθλάσθαι breaking in pieces LXX.Ps.42.10
κατέθλασα I broke them in pieces LXX.Isa.63.3

Liddell-Scott-Jones

καταθλάω (katathlaō) to break in pieces G:V

καταθλάω,

aorist 1 -έθλασα, crush in pieces, ὀστᾶ [LXX]

LSJ Scripture Refs: LXX.Ps.41.11*LXX.Isa.63.3