Hades

that which is out of sight, a Greek word used to denote the
state or place of the dead. All the dead alike go into this
place. To be buried, to go down to the grave, to descend into
hades, are equivalent expressions. In the LXX. this word is the
usual rendering of the Hebrew sheol, the common receptacle of
the departed (Gen. 42:38; Ps. 139:8; Hos. 13:14; Isa. 14:9).
This term is of comparatively rare occurrence in the Greek New
Testament. Our Lord speaks of Capernaum as being "brought down
to hell" (hades), i.e., simply to the lowest debasement, (Matt.
11:23). It is contemplated as a kind of kingdom which could
never overturn the foundation of Christ's kingdom (16:18), i.e.,
Christ's church can never die.

In Luke 16:23 it is most distinctly associated with the doom
and misery of the lost.

In Acts 2:27-31 Peter quotes the LXX. version of Ps. 16:8-11,
plainly for the purpose of proving our Lord's resurrection from
the dead. David was left in the place of the dead, and his body
saw corruption. Not so with Christ. According to ancient
prophecy (Ps. 30:3) he was recalled to life.