And thou shalt appoint
paqad  (paw-kad')
to visit (with friendly or hostile intent); by analogy, to oversee, muster, charge, care for, miss, deposit, etc.
'Aharown  (a-har-one')
Aharon, the brother of Moses -- Aaron.
and his sons
ben  (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.
and they shall wait on
shamar  (shaw-mar')
to hedge about (as with thorns), i.e. guard; generally, to protect, attend to, etc.
their priest's office
khunnah  (keh-hoon-naw')
priesthood -- priesthood, priest's office.
and the stranger
zuwr  (zoor)
to turn aside (especially for lodging); hence to be a foreigner, strange, profane; specifically (active participle) to commit adultery
that cometh nigh
qareb  (kaw-rabe')
near -- approach, come (near, nigh), draw near.
shall be put to death
muwth  (mooth)
causatively, to kill