μαρτυρει verb - present active indicative - third 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)
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.
συ personal pronoun - second person nominative singular
su  soo:  the person pronoun of the second person singular thou -- thou.
ιερευς noun - nominative singular masculine
hiereus  hee-er-yooce':  a priest -- (high) priest.
εις preposition
eis  ice: to or into (indicating the point reached or entered), of place, time, or (figuratively) purpose (result, etc.); also in adverbial phrases
τον definite article - accusative singular masculine
ho  ho: the definite article; the (sometimes to be supplied, at others omitted, in English idiom) -- the, this, that, one, he, she, it, etc.
αιωνα noun - accusative singular masculine
aion  ahee-ohn': an age; by extension, perpetuity (also past); by implication, the world; specially (Jewish) a Messianic period (present or future)
κατα preposition
kata  kat-ah': (prepositionally) down (in place or time), in varied relations
την definite article - accusative singular feminine
ho  ho: the definite article; the (sometimes to be supplied, at others omitted, in English idiom) -- the, this, that, one, he, she, it, etc.
ταξιν noun - accusative singular feminine
taxis  tax'-is: regular arrangement, i.e. (in time) fixed succession (of rank or character), official dignity -- order.
μελχισεδεκ proper noun
Melchisedek  mel-khis-ed-ek': Melchisedek (i.e. Malkitsedek), a patriarch -- Melchisedec.