That I will break
shabar  (shaw-bar')
to burst -- break (down, off, in pieces, up), broken(-hearted), bring to the birth, crush, destroy, hurt, quench, quite, tear
the Assyrian
'Ashshuwr  (ash-shoor')
Ashshur, the second son of Shem; also his descendants and the country occupied by them (i.e. Assyria), its region and its empire
in my land
'erets  (eh'-rets)
the earth (at large, or partitively a land) -- common, country, earth, field, ground, land, natins, way, + wilderness, world.
and upon my mountains
har  (har)
a mountain or range of hills (sometimes used figuratively) -- hill (country), mount(-ain), promotion.
tread him under foot
buwc  (boos)
to trample -- loath, tread (down, under (foot), be polluted.
then shall his yoke
`ol  (ole)
a yoke (as imposed on the neck), literally or figuratively -- yoke.
cuwr  (soor)
to turn off (literal or figurative)
from off them and his burden
cobel  (so'-bel)
a load (figuratively) -- burden.
cuwr  (soor)
to turn off (literal or figurative)
from off their shoulders
shkem  (shek-em')
the neck (between the shoulders) as the place of burdens; figuratively, the spur of a hill -- back, consent, portion, shoulder.