ο definite article - nominative 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.
δε conjunction
de  deh: but, and, etc. -- also, and, but, moreover, now (often unexpressed in English).
καυχωμενος verb - present middle or passive deponent participle - nominative singular masculine
kauchaomai  kow-khah'-om-ahee: to vaunt (in a good or a bad sense) -- (make) boast, glory, joy, rejoice.
εν preposition
en  en: in, at, (up-)on, by, etc.
κυριω noun - dative singular masculine
kurios  koo'-ree-os: supreme in authority, i.e. (as noun) controller; by implication, Master (as a respectful title) -- God, Lord, master, Sir.
καυχασθω verb - present middle or passive deponent imperative - third person singular
kauchaomai  kow-khah'-om-ahee: to vaunt (in a good or a bad sense) -- (make) boast, glory, joy, rejoice.