Lexical Definition

‎ζέω‎ zéō (dzeh'-o) be fervent ^G:V
a primary verb

be fervent.

• to be hot (boil, of liquids
• or glow, of solids), i.e. (figuratively) be fervid (earnest)

Abbott-Smith

ζέω [in LXX for רוּם, רתח, metaph., IV Mac 18:20;]
to boil, be hot; metaph., of anger, love, zeal: ptcp., fervent: τ. πνεύματι, Ac 18:25, Ro 12:11.†

Abbott-Smith References

Liddell-Scott-Jones

ζέω,

contraction 3rd.pers. singular ζεῖ even in [Refs 8th c.BC+]; later Epic dialect ζείω [Refs 3rd c.BC+]subjunctive ζείῃσι Epic. in [Refs]; in late Prose ζέννυμι (which see): imperfect ζέε [Refs 8th c.BC+]future ζέσω (ἐξανα-) [Refs 4th c.BC+]: aorist ἔζεσα [ζέω">Refs 5th c.BC+]; Epic dialect ζέσσα [Refs 8th c.BC+] —passive, aorist ἐζέσθην (ἀπ-) [Refs 1st c.AD+]: perfect ἔζεσμαι [Refs]:—boil, seethe, of water, ἐπεὶ δὴ ζέσσεν ὕδωρ ἐνὶ ἤνοπι χαλκῷ [Refs 8th c.BC+]; ὡς δὲ λέβης ζεῖ ἔνδον as the kettle boils, [Refs 8th c.BC+]; rarely of solids, to be fiery hot, χθὼν ἔζεε [Refs 8th c.BC+]

__2 ferment, [Refs 5th c.BC+]
__3 metaphorically, boil or bubble up, τῆς θαλάσσης ζεσάσης [Refs 5th c.BC+]; οἶνος ζεῖ [Refs 5th c.BC+]

__b of passion, ὁπηνίκ᾽ ἔζει θυμός [Refs 5th c.BC+]
__4 with genitive, boil up or over with a thing, λίμνη ζέουσα ὕδατος καὶ πηλοῦ [Refs 5th c.BC+]; πίθος ζ. [οἴνου] [Refs 4th c.BC+]; πεδία ζείοντ᾽ Ἀγαρηνῶν boiling, teeming with.., [Refs 6th c.AD+]; of persons, ζ. σκωλήκων [Refs 3rd c.BC+]
__II causal, make to boil, boil, τοὶ δὲ λοετρὰ πυρὶ ζέον [Refs 3rd c.BC+]; θυμὸν ἐπὶ Τροίῃ πόσον ἔζεσα; [Refs 1st c.AD+]
__II.2 exhale, ἀϋτμήν (variant{-μῇ}) [Refs 3rd c.BC+], Sanskrit yásati 'boil', OHG.jësan 'ferment', 'foam', Engl. yeast.)