to bury: to lay a dead body in the ground or a tomb
This is the ordinary word for putting a corpse in the earth or in a tomb. Across the Hebrew Bible it almost always means exactly that single act, so its range is narrow and concrete: someone dies, and someone is laid to rest.
What changes from verse to verse is not the action but the angle on it. The same word covers the living attending to their dead, a duty so basic that to leave it undone was unthinkable, and it covers the dead themselves being buried, which is how the historical books sum up a person's life in a single closing line: he died and was buried with his ancestors. A proper grave among one's own people was the expected, honorable end.
The word also carries its own dark shadow. Because burial was the norm, the prophets turn its absence into a curse: bodies left lying in the open, with no one to bury them, is a picture of disgrace and judgment. So the same plain verb names both the honor of a tomb and the horror of being denied one.
When a whole population must be put in the ground at once, after a plague or a slaughter, the texts use a heightened form of the verb for the grim, drawn-out work of clearing away and burying the many. It is the same act, scaled up to disaster, as when Israel must spend seven months burying the slain of Gog.