So it was alway
tamiyd (taw-meed')
continuance (as indefinite extension); but used only (attributively as adjective) constant (or adverbially, constantly); ellipt. the regular (daily) sacrifice
the cloud
`anan (aw-nawn')
a cloud (as covering the sky), i.e. the nimbus or thunder-cloud -- cloud(-y).
covered
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.
it by day and the appearance
mar'eh (mar-eh')
a view (the act of seeing); also an appearance (the thing seen), whether (real) a shape (especially if handsome, comeliness; often plural the looks), or (mental) a vision
of fire
'esh (aysh)
fire -- burning, fiery, fire, flaming, hot.
by night
layil (lah'-yil)
a twist (away of the light), i.e. night; figuratively, adversity -- (mid-)night (season).