Please explain the difference between these words. When to use which?
to kill/killing
to murder/murder
to slaughter/slaughter
to slay/slaying
homicide
massacre
Please explain the difference between these words. When to use which?
to kill/killing
to murder/murder
to slaughter/slaughter
to slay/slaying
homicide
massacre
to kill/killing
Most basic/versatile expression.
to murder/murder
Implies the voluntary killing of a sentient being. In US law, there is a distinction between "murder" (intentionally killing someone) vs. "manslaughter" (unintentionally killing a person); murder is considered even worse.
Depending on the context, "murder" may have a sense of cruelty.
to slaughter/slaughter
Literally to kill an animal prior to butchery. When used in other contexts it has an overtone of being very messy or cruel, because of the association with killing a defenseless animal and then dismembering it. Thus, it has the implication of completeness or thoroughness; an army that was slaughtered was killed brutally; a sports team that was "slaughtered" was beaten by a painfully large margin.
to slay/slaying
Somewhat archaic. Focuses on the act more than the results; may be considered a "deed" or significant action. May also imply a sense of struggle. "He slew the wolf" sounds like he fought with it on equal terms (or terms that were not favorable to him), and accomplished something by killing it; "he murdered the wolf" focuses on having killed a living being, and has a pronounced tone of disapproval.
homicide
Literally killing a person. More of a legal term.
massacre
Killing of a large number of people (or "multiple people" at least--the Boston Massacre actually only resulted in the deaths of five people after all). Usually there is a tone of disapproval, though in metaphoric usage it's similar to "slaughter" above ("We massacred them" in the context of a sporting event means our team won by a large margin.)
These terms vary mostly in number and moral connotation:
Kill: a generic term for ending something's life. Unique in that it does not have a strong moral connotation.
Murder: to criminally and intentionally kill an individual. Has a strongly negative moral connotation. A accidental killing of an individual would be termed 'manslaughter.'
Slaughter: to kill many or brutally. Originally used exclusively to refer to the killing of animals, if applied to humans it communicates a killing, "as if they were animals." Can have a neutral or negative moral connotation:
Slay: an older, less frequently used equivalent of kill. Frequently used in fantasy contexts.
Homicide: a more precise term for a human killing another human. Typically refers to the crime of murder.
Massacre: similar to slaughter: a brutal killing of many. Almost always used refers to killing of people, and almost always has a strong negative connotation.
To a great extent, the rest of these words are synonyms or clarifications of "to kill" or of one another.