'Part' in the Bible

Where thou diest, will I die, and there will I be buried: the LORD do so to me, and more also, if ought but death part thee and me.

And she went, and came, and gleaned in the field after the reapers: and her hap was to light on a part of the field belonging unto Boaz, who was of the kindred of Elimelech.

Tarry this night, and it shall be in the morning, that if he will perform unto thee the part of a kinsman, well; let him do the kinsman's part: but if he will not do the part of a kinsman to thee, then will I do the part of a kinsman to thee, as the LORD liveth: lie down until the morning.

And the near relation said, I am not able to do the relation's part, for fear of damaging the heritage I have: you may do it in my place, for I am not able to do it myself.