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Russian translation of “insidious”

insidious

adjective     /ɪnˈsɪdiəs/
having harmful effects that happen gradually so you do not notice them for a long time
постепенно наносящий вред, коварный
the insidious effects of pollutionIndistinct and invisibleSerious and unpleasantNot attractive to look atInformal words for bad
insidiously adverb
исподволь
insidiousness noun [U]
коварство (болезни и т. д.)
(Definition of insidious adjective from the Cambridge English-Russian Dictionary © Cambridge University Press)

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