η particle
e  ay: disjunctive, or; comparative, than -- and, but (either), (n-)either, except it be, (n-)or (else), rather, save, than, that, what, yea.
μονος adjective - nominative singular masculine
monos  mon'-os: remaining, i.e. sole or single; by implication, mere -- alone, only, by themselves.
εγω personal pronoun - first person nominative singular
ego  eg-o': I, me.
και conjunction
kai  kahee: and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words
βαρναβας noun - nominative singular masculine
Barnabas  bar-nab'-as: son of Nabas (i.e. prophecy); Barnabas, an Israelite -- Barnabas.
ουκ particle - nominative
ou  oo: no or not -- + long, nay, neither, never, no (man), none, (can-)not, + nothing, + special, un(-worthy), when, + without, + yet but.
εχομεν verb - present active indicative - first person
echo  ekh'-o:  (used in certain tenses only) a primary verb; to hold
εξουσιαν noun - accusative singular feminine
exousia  ex-oo-see'-ah: privilege, i.e. (subjectively) force, capacity, competency, freedom, or (objectively) mastery, delegated influence -- authority, jurisdiction, liberty, power, right, strength.
του definite article - genitive 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.
μη particle - nominative
me  may: any but (that), forbear, God forbid, lack, lest, neither, never, no (wise in), none, nor, (can-)not, nothing, that not, un(-taken), without.
εργαζεσθαι verb - present middle or passive deponent infinitive
ergazomai  er-gad'-zom-ahee: to toil (as a task, occupation, etc.), (by implication) effect, be engaged in or with, etc. -- commit, do, labor for, minister about, trade (by), work.