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.
κατα preposition
kata  kat-ah': (prepositionally) down (in place or time), in varied relations
δυναμιν noun - accusative singular feminine
dunamis  doo'-nam-is: force; specially, miraculous power (usually by implication, a miracle itself)
μαρτυρω verb - present active indicative - first person singular
martureo  mar-too-reh'-o: to be a witness, i.e. testify
και conjunction
kai  kahee: and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words
υπερ preposition
huper  hoop-er': over, i.e. (with the genitive case) of place, above, beyond, across, or causal, for the sake of, instead, regarding; with the accusative case superior to, more than -- (+ exceeding, abundantly) above, in (on) behalf of, beyond, by, + very chiefest, concerning, exceeding (above, -ly), for, + very highly, more (than), of, over, on the part of, for sake of, in stead, than, to(-ward), very. In the comparative, it retains many of the above applications.
δυναμιν noun - accusative singular feminine
dunamis  doo'-nam-is: force; specially, miraculous power (usually by implication, a miracle itself)
αυθαιρετοι adjective - nominative plural masculine
authairetos  ow-thah'-ee-ret-os: self-chosen, i.e. (by implication) voluntary -- of own accord, willing of self.