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: full of or threatening death : deadly, murderous, destructive, bloody
: liable to undergo death : mortal
: like death : having the appearance of death : deathly
on his deathful face … a look of pain and baffled anger— Richard Hofstadter
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13th century, in the meaning defined at sense 1
Middle English deethful, from deeth death + -ful
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a nest or breeding place
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