In his neck
tsavva'r (tsav-vawr')
in the sense of binding; the back of the neck (as that on which burdens are bound) -- neck.
remaineth
luwn (loon)
to stop (usually over night); by implication, to stay permanently; hence (in a bad sense) to be obstinate (especially in words, to complain)
strength
`oz (oze)
strength in various applications (force, security, majesty, praise) -- boldness, loud, might, power, strength, strong.
and sorrow
d'abah (deh-aw-baw')
pining; by analogy, fear -- sorrow.
is turned into joy
duwts (doots)
to leap -- be turned.
before
paniym (paw-neem')
the face (as the part that turns); used in a great variety of applications (literally and figuratively); also (with prepositional prefix) as a preposition (before, etc.)
him