נֶפֶשׁ, meaning of nephesh:
1. throat
2. neck
3. breath
4. living being
5. people
6. personality
7. life
8. soul as the centre and transmitter of feelings and perceptions
9. dead soul – deceased person, corpse. See HALOT.
ψυχή, (‘life, soul’) It is oft. impossible to draw hard and fast lines in the use of this multivalent word. Gen. it is used in ref. to dematerialized existence or being, but, apart fr. other data, the fact that ψ. is also a dog’s name suggests that the primary component is not metaphysical, s. SLonsdale, Greece and Rome 26, ’79, 146-59. Without ψ. a being, whether human or animal, consists merely of flesh and bones and without functioning capability. Speculations and views respecting the fortunes of ψ. and its relation to the body find varied expression in our lit.
1.life on earth in its animating aspect making bodily function possible
a. (breath of) life, life-principle, soul, of animals and humans.
b. the condition of being alive, earthly life, life itself.
c.by metonymy, that which possesses life/soul
2.seat and center of the inner human life in its many and varied aspects, soul.
3. an entity w. personhood, person. See BDAG.
Some Lexicon nuances on the noun “nephesh” and “psyche,” not so broad at all. That’s one of the reasons why I avoid theology books if I can help it. Lots of personal opinions in there. I rather find out for myself. By the way, the first Christians were Jews, so they would have adapted Greek terminology to their worldview as contained in the Hebrew-Aramaic Scriptures. I can see why theologians do not like Ezek. 18:4ff. Doesn’t fit their theology at all. Sounds like the new generation theology of the Watchtower. To fit our theology, we change the meaning of the word. Same with gene therapy vs. vaccine. Change the definition for marketing purposes. The following makes it clear, you love God with everything you’ve got.
And he said to him, "You shall love the Lord your God with all your heart and with all your soul and with all your mind. (Matt. 22:37 ESV)
Sheol: Wasteland, void, underworld. Realm of the dead. See HALOT.
Hades: Orig. proper noun, god of the nether world, ‘Hades’, then the nether world, Hades as place of the dead. See BDAG. Obviously the Septuagint translators had to find equivalents and that’s as close as it gets.
The burden of proof is on you, since if you look at the commentaries, Christian and Jewish exegetes almost unanimously interpreted it as I wrote. By the way, logic also supports this, since angels are pure spirits who are able to appear visibly (with God's permission), but this is only apparent, they cannot concieve children.
You speak of the burden of proof. I don’t find it in your next statement. I don’t see the logic either, especially when it contradicts the Scriptures. Pure spirits with the ability to take on a human form (cf. Gen. 18:1ff.). These were angels in human form, able to eat and drink. This ability was taken away from the fallen angels (demons), which makes sense. That's why it became necessary for them to invade and occupy human or animal hosts.