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- pronunciation:
- ihn
sI
di
 s
- features:
- Word Combinations (adjective)
| part of speech: |
adjective |
| definition 1: |
dangerous through cunning, subtlety, and underhandedness.
Their insidious plot included not only the assassination of President Lincoln but the killing of the Vice President and Secretary of State as well. |
| definition 2: |
seemingly or outwardly harmless, but actually very dangerous.
Glaucoma is an insidious disease that can damage a person's eyes before causing any symptoms.The insidious message in the speaker's rhetoric planted seeds of hatred and violence. |
| related words: |
crooked, cunning, dastardly, devious, foxy, subtle |
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| derivations: |
insidiously (adv.), insidiousness (n.) |
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