| English adjective: pernicious | |||
| 1. | pernicious exceedingly harmful | ||
| Synonyms | baneful, deadly, pestilent | ||
| Similar | noxious | ||
| Antonyms | innocuous | ||
| 2. | pernicious working or spreading in a hidden and usually injurious way | ||
| Samples | Glaucoma is an insidious disease. A subtle poison. | ||
| Synonyms | insidious, subtle | ||
| Similar | harmful | ||
| Antonyms | harmless | ||