Synonyms of insidious
- 1. insidious, seductive (vs. unseductive)
- usage: beguiling but harmful; "insidious pleasures"
- 2. insidious, dangerous (vs. safe), unsafe
- usage: intended to entrap
- 3. insidious, pernicious, subtle, harmful (vs. harmless)
- usage: working or spreading in a hidden and usually injurious way; "glaucoma is an insidious disease"; "a subtle poison"
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Definition and meaning of insidious (Dictionary)