Lest haply (ina mhpote). Double final particles (positive and negative with addition of pote). Used here with aorist middle subjunctive in arxwntai (begin). When he hath laid ... and was not able (qento autou ... kai mh iscuonto) to finish (ektelesai). First aorist active infinitive. Note perfective use of ek, to finish out to the end. Two genitive absolutes, first, second aorist active participle qento; second, present active participle iscuonto. To mock him (autwi empaizein). An old verb, em-paizw, to play like a child (pai), at or with, to mock, scoff at, to trifle with like Latin illudere.