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insidious

UK
/ɪnˈsɪd.i.əs/
US
/ɪnˈsɪd.i.əs/

Translations

insidiousadjective
more insidious
Comp.
most insidious
Super.
UK
/ɪnˈsɪd.i.əs/
US
/ɪnˈsɪd.i.əs/
insidieuxSe dit d’un mal, d’une menace ou d’un effet qui progresse de manière lente et sournoise.
The insidious disease progressed without any noticeable symptoms at first.
La maladie insidieuse a progressé sans symptômes visibles au début.
Additional translations
perfidePlus littéraire; insiste sur l’idée de tromperie, de duplicité ou de danger caché.
sournoisRegistre courant; souligne le caractère caché, fourbe ou malveillant.
Synonyms
sly
cunning
deceitful
treacherous
subtle
pernicious
dangerous
stealthy
Antonyms
forthright
open
straightforward
honest

Definitions

insidiousadjective
Proceeding in a gradual, subtle way, but with harmful effects.
The insidious disease progressed without any noticeable symptoms at first.
Treacherous or crafty.
The insidious plan was designed to undermine the company's leadership.
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