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harmful baneful

ADJECTIVE

pestilent/pestilential

Synonyms

WEAK

contagious contaminating corrupting deadly deleterious destructive detrimental diseased evil fatal infectious injurious lethal mortal noxious pernicious pestiferous ruinous tainting troublesome vicious

Antonyms

WEAK

clean healthy hygienic safe sanitary

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.