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Polish translation of “insidious”

insidious

adjective     /ɪnˈsɪdiəs/
having harmful effects that happen gradually so you do not notice them for a long time
podstępny
the insidious effects of pollutionIndistinct and invisibleSerious and unpleasantNot attractive to look atInformal words for bad
insidiously adverb
podstępnie
insidiousness noun [U]
podstępność
(Definition of insidious adjective from the Cambridge English-Polish Dictionary © Cambridge University Press)

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