insidious

Fetched 2026-10-26 (cache).

Synonyms: invidious, incidious, insiduous, desidious, obsidious, assidious, iridious, insipidus

Antonyms: invidious, incidious, insiduous, desidious, obsidious, assidious, iridious, insipidus

Related words from Datamuse; suggestions, not definitions.

Adjective

1. [[cause#Verb|Causing]] [[harm#Noun|harm]] in a [[stealthy]], often [[gradual#Adjective|gradual]], [[manner#Noun|manner]].
2. Intending to [[entrap]]; [[alluring]] but [[harmful]].
3. {{lb|en|nonstandard}} [[treacherous|Treacherous]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.