Fervent
King James Dictionary [1]
FERV'ENT, a. L. fervens, from ferveo, to be hot, to boil, to glow.
1. Hot boiling as a fervent summer fervent blood. 2. Hot in temper vehement.
They are fervent to dispute.
3. Ardent very warm earnest excited animated glowing as fervent zeal fervent piety.
Fervent in spirit. Romans 12 .
Webster's Dictionary [2]
(1): ( a.) Warm in feeling; ardent in temperament; earnest; full of fervor; zealous; glowing.
(2): ( a.) Hot; glowing; boiling; burning; as, a fervent summer.
International Standard Bible Encyclopedia [3]
fûr´vent ( דּלק , dālaḳ ; ἐκτενής , ektenḗs , ζέω , zéō ): "Fervent" (from Latin fervere , "to boil") does not occur in the King James Version of the Old Testament, but the Revised Version (British and American) gives it as the translation of dālaḳ , "to burn" ( Proverbs 26:23 ), instead of "burning," "fervent lips and a wicked heart." In the New Testament it is the translation of ektenēs , "stretched out," hence, intent, earnest ( 1 Peter 4:8 , "being fervent in your love among yourselves"); of zeō , "to boil," "to be hot" ( Romans 12:11 , "fervent in spirit," Acts 18:25 ); of zḗlos , "zeal," "fervor" ( 2 Corinthians 7:7 , the Revised Version (British and American) "zeal"), in James 5:16 the King James Version has: "The effectual fervent prayer of a righteous man availeth much," where the Greek is: polú ischúei déēsis dikaı́ou energouménē , which the Revised Version (British and American) renders, "The supplication of a righteous man availeth much in its working."
"Fervently" is the translation of agonı́zomai , "to strive or struggle" (agonize), Colossians 4:12 the King James Version, the Revised Version (British and American) "Epaphras ... striving for you in his prayers"; of ektenṓs , literally, in an outstretched manner ( 1 Peter 1:22 , the Revised Version (British and American) "Love one another from the heart fervently"; compare 1 Peter 4:8 , "fervent in your love among yourselves"). Christian love too often lacks this fervency , but Christ's love for us was "stretched out" to the uttermost.
The Revised Version (British and American) has "fervently" for "earnestly" ( James 5:17 , margin "with prayer").