pernicious
Word family adverbperniciouslynounperniciousnessadjectivepernicious
per·ni·cious /pəˈnɪʃəs $ pər-/ adjectiveadj formal HARM/BE BAD FORvery harmful or evil, often in a way that you do not notice easily 很有害的〔通常不容易察觉〕 the pernicious effects of poverty 贫穷的危害性
the media’s pernicious influence 媒体的有害影响
► see thesaurus at harmful —perniciously adverbadv
Origin pernicious (1500-1600) French pernicieux, from Latin perniciosus, from pernicies “destruction”, from nex “violent death”