murder

1 murder /ˈmɚdɚ/ noun
plural murders
1 murder
/ˈmɚdɚ/
noun
plural murders
Britannica Dictionary definition of MURDER
1 
: the crime of deliberately killing a person
[noncount]
[count]
— often used before another noun
2 
[noncount] informal : something that is very difficult or unpleasant
◊ To be murder on something is to cause pain or harm to it.

get away with murder

: to murder someone without being captured or punished — usually used figuratively to describe someone who does something very bad or wrong without being criticized or punished

scream bloody/blue murder

— see 1scream
2 murder /ˈmɚdɚ/ verb
murders; murdered; murdering
2 murder
/ˈmɚdɚ/
verb
murders; murdered; murdering
Britannica Dictionary definition of MURDER
[+ object]
1 
: to kill (a person) in a deliberate and unlawful way : to commit the murder of (someone)
— sometimes used figuratively
2 
informal
a  : to spoil or ruin (something)
: to perform (something) very badly
b  : to defeat (an opponent) very badly

— murderer

/ˈmɚdɚrɚ/ noun, plural murderers [count]

— murderess

/ˈmɚdərəs/ noun, plural murderesses old-fashioned [count]