Select the correct synonym for the word given below:
INSIDIOUS
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Treacherous
Insidious means causing harm slowly and secretly, so that the danger is not noticed until it is too late. Its synonym is treacherous.
Example: High blood pressure is an insidious disease.
| Word | Meaning | Example |
|---|---|---|
| (1) Treacherous (answer) | deceptive and dangerous, not to be trusted (both words describe hidden, deceitful harm) | The climbers crossed the treacherous ice slowly. |
| (2) Sincere | honest, meaning what one says (it is nearly the opposite of insidious) | Please accept my sincere apologies. |
| (3) Intelligent | quick to learn and understand (it says nothing about hidden harm) | She is an intelligent student. |
| (4) Smart | clever, or neat and stylish in appearance | He looked smart in his new suit. |
| Synonyms of insidious: treacherous, stealthy, sly, deceptive Antonyms of insidious: sincere, open, straightforward, harmless Also asked in CUET (UG): treacherous – 31-05-2026 Slot 2, 26-05-2026 Slot 1, 03-06-2025 Slot 1 |