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.
ουν conjunction
oun  oon: (adverbially) certainly, or (conjunctionally) accordingly -- and (so, truly), but, now (then), so (likewise then), then, therefore, verily, wherefore.
γινεσθε verb - present middle or passive deponent imperative - second person
ginomai  ghin'-om-ahee: to cause to be (gen-erate), i.e. (reflexively) to become (come into being), used with great latitude (literal, figurative, intensive, etc.)
συμμετοχοι adjective - nominative plural masculine
summetochos  soom-met'-okh-os:  a co-participant -- partaker.
αυτων personal pronoun - genitive plural masculine
autos  ow-tos': the reflexive pronoun self, used of the third person , and (with the proper personal pronoun) of the other persons