insidious

Describes something that is subtly harmful, dangerous, or deceitful, often spreading gradually without being noticed.

ruОписывает что-то, что является незаметно вредным, опасным или коварным, часто распространяясь постепенно, оставаясь незамеченным.esDescribe algo que es dañino o peligroso de manera encubierta o traicionera, a menudo extendiéndose o actuando gradualmente sin ser notado.frDécrit quelque chose qui est nuisible, dangereux ou perfide de manière discrète, se propageant souvent progressivement et passant inaperçu.deBeschreibt etwas, das auf heimtückische und schleichende Weise schädlich oder gefährlich ist und oft zunächst unbemerkt bleibt.ptDescreve algo que causa dano ou perigo de forma sutil e gradual, sem ser percebido; frequentemente se refere a algo traiçoeiro ou ardiloso que age de maneira oculta.zh形容某种事物在不知不觉中造成危害或危险，常指暗中逐渐蔓延而不易察觉的。也可指人阴险狡诈、善于暗中算计。arيصف شيئًا ضارًا أو خطيرًا أو ماكرًا بشكل خفي، ينتشر تدريجيًا دون أن يُلاحظ.

1. Subtly harmful C1 formal

   Proceeding in a gradual, subtle way but with harmful effects.

   • The insidious disease spread without any early symptoms.
   • Prejudice can have an insidious effect on society.
   • The insidious influence of propaganda eroded public trust.

   ruКоварныйesinsidiosofrinsidieux (nuisance sournoise)deHeimtückischptInsidiosozh阴险arخبيث الأثر

   Synonymes: corrosivedeceptiveperniciousstealthysubtletreacherousunderhanded

   Antonymes: blatantdirectflagrantobviousovert

2. Treacherous or deceitful C1 formal

   Intended to entrap or deceive in a cunning way.

   • The insidious plot was designed to overthrow the government.
   • He used insidious tactics to manipulate his colleagues.
   • The insidious nature of the scheme made it hard to detect.

   ruКоварныйesInsidioso (traicionero o engañoso)frinsidieux (sens trompeur)deHeimtückischptInsidiosozh阴险arماكر خداع

   Synonymes: craftycunningdeceitfulguilefulslysubtletreacherousunderhandedwily

   Antonymes: candidforthrightguilelesshonestopenstraightforward

• more insidious comparative form
• most insidious superlative form