[Elamur Dictionary](https://md.dictionary.elamur.ai/free/en/) · [this page in HTML](https://dictionary.elamur.ai/free/en/english/insidious/)

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# insidious

adjective

«insidious» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. Insidious means harmful in a sneaky way that works slowly and is hard to spot. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/I/insidious/#m1)
2. An insidious person pretends to be a friend while secretly planning harm. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/I/insidious/#m2)

### In the lessons

in tales a wicked adviser whispers lies to a king; in everyday life a habit that does damage without you noticing

### Examples

- The insidious fog crept into every room. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/I/insidious/#x1)
- The wolf's insidious plan fooled the whole village. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/I/insidious/#x2)
- Lies can be insidious because they spread quietly. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/I/insidious/#x3)

### Note

nothing for maths

## On Mova

- [Trees and pragmatics of «insidious» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/I/insidious/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«insidious» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/insidious.html) on Mova free.