And when the camp
machaneh  (makh-an-eh')
an encampment (of travellers or troops); hence, an army, whether literal (of soldiers) or figurative (of dancers, angels, cattle, locusts, stars; or even the sacred courts)
setteth forward
naca`  (naw-sah')
to pull up, especially the tent-pins, i.e. start on a journey
'Aharown  (a-har-one')
Aharon, the brother of Moses -- Aaron.
shall come
bow'  (bo)
to go or come (in a wide variety of applications)
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 take down
yarad  (yaw-rad')
to descend; causatively, to bring down (in all the above applications)
the covering
macak  (maw-sawk')
a cover, i.e. veil -- covering, curtain, hanging.
poreketh  (po-reh'-keth)
a separatrix, i.e. (the sacred) screen -- vail.
and cover
kacah  (kaw-saw')
to plump, i.e. fill up hollows; by implication, to cover (for clothing or secrecy) -- clad self, close, clothe, conceal, cover (self), (flee to) hide, overwhelm.
the ark
'arown  (aw-rone')
a box -- ark, chest, coffin.
of testimony
`eduwth  (ay-dooth')
testimony -- testimony, witness.
with it