Insidious
Insidious adjective - Working or spreading in a hidden and usually injurious way.
Usage example: glaucoma is an insidious disease
Subtle is a synonym for insidious in stealthy topic. In some cases you can use "Subtle" instead an adjective "Insidious", when it comes to topics like sly, crafty, cunning, sneaky. popular alternative
Nearby Word: insidiously
Subtle
Mutual synonyms
Both words in one sentence
- Neon Genesis Evangelion is abundant with this, though of a more subtle and insidious brand than any of those above.
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Rather, glyph magic concerns scyring, and more subtle and insidious effects.
Source: Instant Runes -
The forces of Chaos in Warhammer and Warhammer 40,000 are highly subtle and insidious, able to convince people to join them by, amongst others, making the victim think that he is benefiting the fight for "good" by doing so.
Source: More Than Mind Control
Cite this Source
Subtle and Insidious. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/insidious/subtle
Insidious & Subtle. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/insidious/subtle>.
Subtle or Insidious. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/insidious/subtle.
Google Ngram Viewer shows how "insidious" and "subtle" have occurred on timeline