pernicious
🇺🇸
/pərˈnɪʃəs/
🇬🇧
/pəˈnɪʃəs/
causing serious harm in a way that is not immediately obvious
The pernicious effects of pollution on the environment are becoming more evident every day.
오염이 환경에 미치는 해로운 영향은 매일 더욱 분명해지고 있습니다.