LSJ Gloss:ἐκτένειαintensity, zeal, earnestnessDodson:ἐκτένειαearnestness, strenuousness, intentnessearnestness, strenuousness, intentness, zeal.
TBESG:ἐκτένειαearnestnessG:N-F ἐκ-τένεια, -ας, ἡ (< ἐκτενής), [in LXX: Refs Jdth.4:9, 2Ma.14:38, 3Ma.6:41 * ;] zeal, intentness, earnestness (cf. Deiss., BS, 262): Act.26:7.† (AS)
ἐκτενέστερον ektenesteron ek-ten-es'-ter-on Neuter of the compound of G1618; more intentlyKJV Usage: more earnestly.