Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
φλεγμαίνουσα inflamed LXX.Isa.1.6
εφλέγμανεν is inflamed LXX.Nah.3.19

Liddell-Scott-Jones

φλεγμαίνω (phlegmainō) be inflamed G:V

φλεγμαίνω-αίνω,

aorist ἐφλέγμηνα [Refs 5th c.BC+]; later -ᾱνα [LXX]

__I transitive, causeto swell up; of food, fill, nourish, opposed to ἰσχναίνω, [Refs 5th c.BC+]
__II intransitive, to be heated, inflamed, fester, [Refs] [same place]; πληγὴφλεγμαίνωαίνουσα[LXX+5th c.BC+]
__II.b to be swollen, [Refs 5th c.BC+]
__II.2 of the sea, seethe, M.Ant.[same place]; κῦμα φλεγμαίνωαῖνον [Refs 3rd c.AD+]
__II.3 metaphorically, φλεγμαίνωαίνουσα πόλις, opposed to ὑγιής, [Refs 5th c.BC+]; ἀρχὴ φλεγμαίνωαίνουσα, ={σπαργῶσα καὶ θυμουμένη}, [Refs 1st c.AD+]; of feelings, etc., [Refs 2nd c.BC+]; also of luxury, πολυτελεῖς καὶ φλεγμαίνωαίνουσαι τράπεζαι [Refs 1st c.AD+]; also τὰ ἐν Βαβυλῶνι φλεγμαίνωαίνοντα, of extravagant court ceremonial, [Refs 2nd c.AD+]

LSJ Scripture Refs: LXX.Nah.3.19LXX.Isa.1.6