History
History
Synonyms
UK
US
Meaning:
deadly

causing, likely to cause, death

causing end of life

destructive

causing destruction; fond of, in the habit of, destroying

injurious, devastating

injurious

causing, likely to cause, injury

hurtful

malicious

feeling, showing, caused by, malice

hateful

mischievous

filled with, engaged in, mischief

devilish, wicked

noxious

harmful

deadly, injurious

pernicious

extremely harmful, causing distress

bad, hurtful

poisonous

having poison; causing death or injury

harmful

ruinous

causing ruin

disastrous, devastating

septic

causing, caused by infection (with disease germs)

harmful

sinister

suggesting evil or the likelihood of bad luck

nasty, menacing

unwholesome

(of food) not good for one's health; harmful

unhealthful

DELETERIOUS as in Wiktionary
DELETERIOUS as in Wikipedia