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 Dictionary entry overview: What does insidiously mean? 

  The adverb INSIDIOUSLY has 1 sense:

1. in a harmfully insidious manner

  Familiarity information: INSIDIOUSLY used as an adverb is very rare.

 Dictionary entry details 


Sense 1insidiously [BACK TO TOP]


In a harmfully insidious manner


insidiously; perniciously

Context example:

these drugs act insidiously


insidious (working or spreading in a hidden and usually injurious way)

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