Noun
manslaying (countable and uncountable, plural manslayings)
The deliberate killing of a human being; murder.
An insatiate lust of conquest transmutes manslaying into a virtue; and, amongst more races than one, implacable revenge has made assassination a duty. A clever theft was praiseworthy amongst the Spartans; and it is equally so amongst Christians, provided it be on a sufficiently large scale. Herbert Spencer