Adjective
-
(of a disease) having a rapid course and violent effect
-
exceedingly harmful
-
involving loss of divine grace or spiritual death
"the seven deadly sins"
-
extremely poisonous or injurious
producing venom
"venomous snakes"
"a virulent insect bite"
-
of an instrument of certain death
"deadly poisons"
"lethal weapon"
"a lethal injection"
-
causing or capable of causing death
"a fatal accident"
"a deadly enemy"
"mortal combat"
"a mortal illness"
Adverb
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(used as intensives) extremely
"she was madly in love"
"deadly dull"
"deadly earnest"
"deucedly clever"
"insanely jealous"
-
as if dead