My soul
nephesh (neh'-fesh)
a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental)
melteth
dalaph (daw-laf')
to drip; by implication, to weep -- drop through, melt, pour out.
for heaviness
tuwgah (too-gaw')
depression (of spirits); concretely a grief -- heaviness, sorrow.
strengthen
quwm (koom)
to rise (in various applications, literal, figurative, intensive and causative)
thou me according unto thy word
dabar (daw-baw')
a word; by implication, a matter (as spoken of) or thing; adverbially, a cause