How long shall I be with you and bear with you? (heōs pote esomai pros humās kai anexomai humōṉ). Here the two questions of Mar 9:19 (only one in Mat 17:17) are combined in one sentence.
Bear with (anexomai, direct middle future) is, hold myself from you (ablative case humōn).
Faithless (apistos) is disbelieving and perverse (diestrammenē, perfect passive participle of diastrephō), is twisted, turned, or torn in two.