Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
κατατρύφησον Revel LXX.Ps.37.4
κατατρυφήσουσιν they shall revel LXX.Ps.37.11

Liddell-Scott-Jones

κατατρυφάω (katatruphaō) to revel G:V

κατατρυφάω,

make merry, be insolent, [Refs 2nd c.AD+]

__II with genitive, delight in, [LXX]; ἐπὶ πλήθει εἰρήνης [Refs]

LSJ Scripture Refs: LXX.Ps.36.4*