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insidious
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Quick answer
As an adjective, insidious means producing harm in a stealthy, often gradual, manner.
Meanings of insidious
4 meaningsadjective
Producing harm in a stealthy, often gradual, manner.
Intending to entrap; alluring but harmful.
“Hansel and Gretel were lured by the witch’s insidious gingerbread house.”
nonstandardTreacherous.
“The battle was lost due to the actions of insidious defectors.”
Working or spreading in a hidden and usually injurious way
“glaucoma is an insidious disease”
“a subtle poison”
Similar: pernicious, subtle
Meanings from Wiktionary (CC BY-SA 4.0) and Open English WordNet (CC BY 4.0).
Synonyms by meaning
adjective: working or spreading in a hidden and usually injurious way
Words that rhyme with insidious
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Scrabble & Words With Friends: valid word10 points before bonuses.9 letters.
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