G2620–κατακαυχάομαι–katakauchaomai

beware of glorying over the natural branches. Or if you are so glorying, do not forget that it is not you who uphold the root: the root upholds you.

κατακαυχῶ katakauchō “do boast”κατακαυχᾶσαι, katakauchasai “you boast against [them],”

For he who shows no mercy will have judgement given against him without mercy; but mercy triumphs over judgement.

κατακαυχᾶται katakauchatai “it triumphs over”

But if in your hearts you have bitter feelings of envy and rivalry, do not speak boastfully and falsely, in defiance of the truth.

κατακαυχᾶσθε katakauchasthe “do boast [of it]”