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 | ||