deadly

adjectives

causing or capable of causing death
"a fatal accident"; "a deadly enemy"; "mortal combat"; "a mortal illness"
deadly, deathly, mortal
is derived from
deadliness
of an instrument of certain death
"deadly poisons"; "lethal weapon"; "a lethal injection"
deadly, lethal
is derived from
deadliness
extremely poisonous or injurious; producing venom
"venomous snakes"; "a virulent insect bite"
deadly, venomous, virulent
is derived from
deadliness
involving loss of divine grace or spiritual death
"the seven deadly sins"
deadly, mortal
is derived from
deadliness
exceedingly harmful
baneful, deadly, pernicious, pestilent
is derived from
deadliness
(of a disease) having a rapid course and violent effect
deadly
is derived from
deadliness
is similar to
infectious; having the ability to cause disease
virulent

adverbs

as if dead
deadly, lifelessly
is derived from
dead
(used as intensives) extremely
"she was madly in love"; "deadly dull"; "deadly earnest"; "deucedly clever"; "insanely jealous"
deadly, deucedly, devilishly, insanely, madly