dangerous, Pernicious, malicious
calamitous
Toxic, perhaps.
harmful, damaging
Harmful is an adjective.
you could say 'quickly profused' if its spreading in a bad or harmful way then the word is 'insidious'
There are two syllables in the word harmful. (harm-ful)
The word harmful is an adjective.The adverb form of the word is harmfully.
"Damnum" is the Latin word for harmful or damaging.
The word 'harmful' is not a noun.The word 'harmful' is an adjective, a word used to describe a noun.The noun form of the adjective 'harmful' is harmfulness.The word 'harmful' is the adjective form of the noun harm.The nouns 'harmfulness' and 'harm' are both common, uncountable (mass), abstract nouns; words for concepts.The word 'harm' is also a verb: harm, harms, harming, harmed.
Another word for suppressing information is "censoring." Censorship involves restricting or controlling access to information, often to prevent the dissemination of ideas deemed undesirable or harmful. This can occur in various contexts, including media, government, and education.
harmful
Another jaguar