Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
γρύξει growl LXX.Exod.11.7
έγρυξεν growled LXX.Josh.10.21

Liddell-Scott-Jones

γρύζω (gruzō) to growl G:V

γρύζω,

future γρύξω, [LXX+5th c.BC+], γρύξομαι [Refs 7th c.BC+]aorist ἔγρυξα (see. below):—say γρῦ (see. entry), grumble, mutter, γρύζειν δὲ καὶ τολμᾶτον.. ; [Refs 5th c.BC+]; οὐκ ἐτόλμα γρύξαι τὸ παράπαν probably in [γρύζω ἀπηνὲς οὐδέν 3rd c.BC: Callimachus Epicus “Iambi” 1.257 ">Refs 4th c.BC+]; later, growl, of a dog, LXX [same place]; grunt, of a pig, [Refs 4th c.AD+]; grumble, murmur, πρός τινα [Refs 3rd c.AD+]

__II future γρύσει, ={τήξει} will liquefy, [Refs 4th c.BC+]

LSJ Scripture Refs: LXX.Exod.11.7