pernicious
/pərˈnɪʃəs/
adjective
- Having a very harmful or destructive effect, often in a gradual or subtle way.
- The pernicious effects of gossip can destroy friendships over time.
- Social media can have a pernicious influence on young people's self-esteem.
- The pernicious weed spread through the garden, choking out all the flowers.
Antonyms