μαρτυρω verb - present active indicative - first person singular
martureo  mar-too-reh'-o: to be a witness, i.e. testify
γαρ conjunction
gar  gar: assigning a reason (used in argument, explanation or intensification; often with other particles)
αυτοις personal pronoun - dative plural masculine
autos  ow-tos': the reflexive pronoun self, used of the third person , and (with the proper personal pronoun) of the other persons
οτι conjunction
hoti  hot'-ee: demonstrative, that (sometimes redundant); causative, because -- as concerning that, as though, because (that), for (that), how (that), (in) that, though, why.
ζηλον noun - accusative singular masculine
zelos  dzay'-los: heat, i.e. (figuratively) zeal (in a favorable sense, ardor; in an unfavorable one, jealousy, as of a husband (figuratively, of God), or an enemy, malice)
θεου noun - genitive singular masculine
theos  theh'-os: a deity; figuratively, a magistrate; by Hebraism, very -- exceeding, God, god(-ly, -ward).
εχουσιν verb - present active indicative - third person
echo  ekh'-o:  (used in certain tenses only) a primary verb; to hold
αλλ conjunction
alla  al-lah': other things, i.e. (adverbially) contrariwise (in many relations) -- and, but (even), howbeit, indeed, nay, nevertheless, no, notwithstanding, save, therefore, yea, yet.
ου particle - nominative
ou  oo: no or not -- + long, nay, neither, never, no (man), none, (can-)not, + nothing, + special, un(-worthy), when, + without, + yet but.
κατ preposition
kata  kat-ah': (prepositionally) down (in place or time), in varied relations
επιγνωσιν noun - accusative singular feminine
epignosis  ep-ig'-no-sis: recognition, i.e. (by implication) full discernment, acknowledgement -- (ac-)knowledge(-ing, -ment).