Jer. 32:41 KJV (With Strong’s)

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41
Yea, I will rejoice
suws (Hebrew #7797)
a primitive root; to be bright, i.e. cheerful
KJV usage: be glad, X greatly, joy, make mirth, rejoice.
Pronounce: soos
Origin: or siys {sece}
i over them to do them good
towb (Hebrew #2895)
a primitive root, to be (transitively, do or make) good (or well) in the widest sense
KJV usage: be (do) better, cheer, be (do, seem) good, (make) goodly, X please, (be, do, go, play) well.
Pronounce: tobe
, and I will plant
nata` (Hebrew #5193)
properly, to strike in, i.e. fix; specifically, to plant (literally or figuratively)
KJV usage: fastened, plant(- er).
Pronounce: naw-tah'
Origin: a primitive root
k them in this land
'erets (Hebrew #776)
the earth (at large, or partitively a land)
KJV usage: X common, country, earth, field, ground, land, X natins, way, + wilderness, world.
Pronounce: eh'-rets
Origin: from an unused root probably meaning to be firm
κassuredly
'emeth (Hebrew #571)
stability; (figuratively) certainty, truth, trustworthiness
KJV usage: assured(-ly), establishment, faithful, right, sure, true (-ly, -th), verity.
Pronounce: eh'-meth
Origin: contracted from 539
with my whole heart
leb (Hebrew #3820)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect; likewise for the centre of anything
KJV usage: + care for, comfortably, consent, X considered, courag(-eous), friend(-ly), ((broken-), (hard-), (merry-), (stiff-), (stout-), double) heart((-ed)), X heed, X I, kindly, midst, mind(-ed), X regard((-ed)), X themselves, X unawares, understanding, X well, willingly, wisdom.
Pronounce: labe
Origin: a form of 3824
and with my whole soul
nephesh (Hebrew #5315)
properly, a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental)
KJV usage: any, appetite, beast, body, breath, creature, X dead(-ly), desire, X (dis-)contented, X fish, ghost, + greedy, he, heart(-y), (hath, X jeopardy of) life (X in jeopardy), lust, man, me, mind, mortally, one, own, person, pleasure, (her-, him-, my-, thy-)self, them (your)-selves, + slay, soul, + tablet, they, thing, (X she) will, X would have it.
Pronounce: neh'-fesh
Origin: from 5314
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Cross References

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Yea, I.
and I.
assuredly.
Heb. in truth, or stability.

J. N. Darby Translation

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41
And I will rejoice over them to do them good, and I will assuredly plant them in this land with my whole heart and with my whole soul.