Cast
shalak (shaw-lak)
to throw out, down or away -- adventure, cast (away, down, forth, off, out), hurl, pluck, throw.
thy burden
yhab (ye-hawb')
what is given (by Providence), i.e. a lot -- burden.
upon the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
and he shall sustain
kuwl (kool)
to keep in; hence, to measure; figuratively, to maintain
thee he shall never
`owlam (o-lawm')
concealed, i.e. the vanishing point; generally, time out of mind (past or future), i.e. (practically) eternity; frequentatively, adverbial (especially with prepositional prefix) always
suffer
nathan (naw-than')
to give, used with greatest latitude of application (put, make, etc.)
the righteous
tsaddiyq (tsad-deek')
just -- just, lawful, righteous (man).
to be moved
mowt (mote)
to waver; by implication, to slip, shake, fall -- be carried, cast, be out of course, be fallen in decay, exceedingly, fall(-ing down), be (re-)moved, be ready, shake, slide, slip.