And I will turn
shuwb  (shoob)
to turn back (hence, away) transitively or intransitively, literally or figuratively
my hand
yad  (yawd)
a hand (the open one (indicating power, means, direction, etc.),
upon thee and purely
bor  (bore)
vegetable lye (from its cleansing); used as a soap for washing, or a flux for metals -- never so, purely.
purge away
tsaraph  (tsaw-raf')
to fuse (metal), i.e. refine -- cast, (re-)fine(-er), founder, goldsmith, melt, pure, purge away, try.
thy dross
ciyg  (seeg)
scoria -- dross.
and take away
cuwr  (soor)
to turn off (literal or figurative)
all thy tin
bdiyl  (bed-eel')
alloy (because removed by smelting); by analogy, tin -- + plummet, tin.