Yukrahu is a passive imperfect verb: 'it is disliked.' In an yuqaddima, an governs the subjunctive imperfect. Thiqalahu is an accusative object with the attached possessor, his load.
In ḥattā yarmiya, ḥattā introduces the endpoint 'until he stones', and the imperfect is in the subjunctive. The phrase connects departure preparations to the completion of the rite.