ὑπεραποκρίνεσθαι
From LSJ
Greek > English (Woodhouse Verbs Reversed)
(see also ὑπεραποκρίνομαι): defend, answer for, answer on behalf of, reply on behalf of another
(see also ὑπεραποκρίνομαι): defend, answer for, answer on behalf of, reply on behalf of another