Your carcases
peger  (peh'gher)
a carcase (as limp), whether of man or beast; figuratively, an idolatrous image -- carcase, corpse, dead body.
shall fall
naphal  (naw-fal')
to fall, in a great variety of applications (intransitive or causative, literal or figurative)
in this wilderness
midbar  (mid-bawr')
a pasture (i.e. open field, whither cattle are driven); by implication, a desert; also speech (including its organs) -- desert, south, speech, wilderness.
and all that were numbered
paqad  (paw-kad')
to visit (with friendly or hostile intent); by analogy, to oversee, muster, charge, care for, miss, deposit, etc.
of you according to your whole number
micpar  (mis-pawr')
a number, definite (arithmetical) or indefinite (large, innumerable; small, a few); also (abstractly) narration
from twenty
`esriym  (es-reem')
twenty; also (ordinal) twentieth -- (six-)score, twenty(-ieth).
shaneh  (shaw-neh')
a year (as a revolution of time) -- + whole age, long, + old, year(-ly).
ben  (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.
and upward
ma`al  (mah'al)
the upper part, used only adverbially with prefix upward, above, overhead, from the top, etc. -- above, exceeding(-ly), forward, on (very) high, over, up(-on, -ward), very.
which have murmured
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)
against me