Insidious
Insidious adjective - Working or spreading in a hidden and usually injurious way.
Shrewd and insidious are semantically related in cunning topic. In some cases you can use "Shrewd" instead an adjective "Insidious".
Nearby Word: insidiously
Mutual synonyms
Cite this Source
Shrewd and Insidious. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/insidious/shrewd
Insidious & Shrewd. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/insidious/shrewd>.
Shrewd or Insidious. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/insidious/shrewd.
Google Ngram Viewer shows how "insidious" and "shrewd" have occurred on timeline