Thy borders
gbuwl (gheb-ool')
a cord (as twisted), i.e. (by implication) a boundary; by extens. the territory inclosed -- border, bound, coast, great, landmark, limit, quarter, space.
are in the midst
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
of the seas
yam (yawm)
from an unused root meaning to roar -- sea (-faring man, (-shore), south, west (-ern, side, -ward).
thy builders
banah (baw-naw')
to build (literally and figuratively) -- (begin to) build(-er), obtain children, make, repair, set (up), surely.
have perfected
kalal (kaw-lal')
to complete -- (make) perfect.
thy beauty
yophiy (yof-ee')
beauty -- beauty.