And thy heaven
shamayim (shaw-mah'-yim)
air, astrologer, heaven(-s).
that is over thy head
ro'sh (roshe)
the head (as most easily shaken), whether literal or figurative (in many applications, of place, time, rank, itc.)
shall be brass
nchosheth (nekh-o'-sheth)
copper, hence, something made of that metal, i.e. coin, a fetter; figuratively, base (as compared with gold or silver)
and the earth
'erets (eh'-rets)
the earth (at large, or partitively a land) -- common, country, earth, field, ground, land, natins, way, + wilderness, world.
that is under thee shall be iron
barzel (bar-zel')
iron (as cutting); by extension, an iron implement -- (ax) head, iron.