ˈdethfəl adjective
Etymology: Middle English deethful, from deeth death + -ful
1. archaic : full of or threatening death : deadly , murderous , destructive , bloody
2. archaic : liable to undergo death : mortal
3. : like death : having the appearance of death : deathly
on his deathful face … a look of pain and baffled anger — Richard Hofstadter
• death·ful·ly -əlē adverb