i Register
In some senses, deathful is marked as literary. Watch for register when choosing this word.
deathful
adj 3
Definitions
adj
1
Involving the danger of death; fatal, deadly.
Five hapless swains with soft allusive smiles / The harlot meshes in her deathful toils […].
2
Resembling or pertaining to death; deathly.
3
Subject to death; mortal.
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