Lexical Definition

‎ἐκτενέστερον‎ ektenésteron (ek-ten-es'-ter-on) earnestly ^G:A
neuter of the comparative of ‎ἐκτενής‎

more earnestly.

• more intently

Liddell-Scott-Jones

ἐκτενέστερον-ής, ές,

strained: hence of persons, warmly attached, friendly, [Refs 5th c.BC+]; assiduous, περί τινα [Refs 2nd c.BC+]: comparative - έστερος τῇ προθυμίᾳ [Refs 2nd c.BC+]: superlative - εστάτη προθυμία [Refs 3rd c.BC+]

__2 extended, [Refs 5th c.AD+]; capable of extension, ἐ. ἐστι τὸ μεταδίδον τῶν ἑαυτοῦ καὶ τοῖς ἄλλοις [Refs 5th c.AD+]
__3 abundant, γάλα [Refs 2nd c.AD+]
__II adverb -νῶς (Elean ἐκτενέστερονέωρ [ἐκτενέστερονίως [prev. work]5138.13;">Refs] Ionic dialect -έως Ps.-[Refs 5th c.BC+] earnestly, zealously, ἀγαπᾶσθαι Machoap.[Refs 4th c.BC+]; εὐχὴ ἐ. γινομένη [NT]: comparative -έστερον [Refs 1st c.BC+]: superlative -έστατα [Refs 1st c.BC+]
__II.2 in adverb also, eagerly, freely, splendidly (condemned by [Refs 2nd c.BC+]; of public duties, λαμπρῶς καὶ ἐ. τετελεκότα [Refs]: comparative, πολυτελῶς καὶ ἐκτενέστερονέστερον τῶν ἄλλων [Refs 2nd c.BC+]—Not in early writers, corrupt in [Refs 4th c.BC+]

_{LSJ Scripture Refs: Acts.12.5}