mur ‧ der ‧ ous /ˈmɜːd ə rəs $ ˈmɜːr-/ BrE AmE adjective
[ Word Family: noun : ↑ murder , ↑ murderer ; verb : ↑ murder ; adverb : ↑ murderously ; adjective : ↑ murderous ]
1 . very dangerous and likely to kill people:
a murderous attack
murderous drug dealers
2 . murderous look/expression/glare etc an expression or look which shows that someone is very angry
—murderously adverb