Therefore as the fire
'esh  (aysh)
fire -- burning, fiery, fire, flaming, hot.
'akal  (aw-kal')
to eat -- at all, burn up, consume, devour(-er, up), dine, eat(-er, up), feed (with), food, freely, in...wise(-deed, plenty), (lay) meat, quite.
the stubble
qash  (kash)
straw (as dry) -- stubble.
and the flame
lashown  (law-shone')
the tongue (of man or animals), used literally (as the instrument of licking, eating, or speech), and figuratively (speech, an ingot, a fork of flame, a cove of water)
lehabah  (leh-aw-baw')
flame(-ming), head (of a spear).
raphah  (raw-faw')
to slacken (in many applications, literal or figurative)
the chaff
chashash  (khaw-shash')
dry grass -- chaff.
so their root
sheresh  (sheh'-resh)
a root -- bottom, deep, heel, root.
shall be as rottenness
maq  (mak)
a melting, i.e. putridity -- rottenness, stink.
and their blossom
perach  (peh'-rakh)
a calyx (natural or artificial); generally, bloom -- blossom, bud, flower.
shall go up
`alah  (aw-law')
to ascend, intransitively (be high) or actively (mount); used in a great variety of senses, primary and secondary, literal and figurative (as follow)
as dust
'abaq  (aw-bawk')
light particles (as volatile) -- (small) dust, powder.
because they have cast away
ma'ac  (maw-as')
to spurn; also (intransitively) to disappear
the law
towrah  (to-raw')
a precept or statute, especially the Decalogue or Pentateuch -- law.
of the LORD
Yhovah  (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
of hosts
tsaba'  (tsaw-baw')
a mass of persons (or figuratively, things), especially reg. organized for war (an army); by implication, a campaign, literally or figuratively (specifically, hardship, worship)
and despised
na'ats  (naw-ats')
to scorn; or (Ecclesiastes 12:5), to bloom -- abhor, (give occasion to) blaspheme, contemn, despise, flourish, great, provoke.
the word
'imrah  (im-raw')
commandment, speech, word.
of the Holy One
qadowsh  (kaw-doshe')
sacred (ceremonially or morally); (as noun) God (by eminence), an angel, a saint, a sanctuary -- holy (One), saint.
of Israel
Yisra'el  (yis-raw-ale')
he will rule as God; Jisrael, a symbolical name of Jacob; also (typically) of his posterity: --Israel.