to take a fellow human being's life by violence in a way the community must answer for: the killing that triggers Israel's blood-revenge and refuge-city laws, covering murder, accidental killing, and even the killing done in response to it
This verb names a specific band of killing, and the surprising thing about it is how wide that band is. It is never used of killing in war, of slaughtering an animal, or of God taking a life. It always has a human victim, and it always belongs to the world of bloodguilt: a life has been taken inside the community, and that has to be dealt with. That is its core, and everything else is the range it covers within that core.
Within Israel's homicide laws the same word stretches across the whole spectrum of one person killing another. It names the cold-blooded murderer who strikes with a weapon and intent, and in the very next breath it names the person who kills by pure accident and runs to a city of refuge to escape revenge. Most startling of all, it can name the avenger who lawfully kills the killer, and the court that executes a convicted murderer. One Hebrew word does all of this, which is why no single English word fits: "murder" is too narrow to hold the accidental killer and the executioner, while "kill" is too broad, since this word excludes the soldier and the butcher.
When the word leaves the law courts and enters the Prophets and Psalms, it sharpens into an accusation. There it brands the killing of the weak, the ambush on the road, and the judicial murder dressed up as legal procedure. Elijah can throw it at King Ahab even though Naboth was killed through a rigged but technically legal trial, because the word refuses to let proper paperwork hide the moral fact that an innocent man was put to death.
The single most important thing to understand is that this word does not settle the moral question by itself. It marks the act as the killing of a fellow human that the community must reckon with; whether a given killing is criminal, accidental, or just is decided by the surrounding law and context, not by the word alone.