smrtonosný znamená v angličtina

deadly [deadlier, deadliest]▼(lethal)
adjective
[UK: ˈded.li] [US: ˈded.li]

lethal▼(of, pertaining to, or causing death; deadly; mortal; fatal)
adjective
[UK: ˈliːθ.l̩] [US: ˈliːθ.l̩]