deleterious
adjective formal uk/ˌdel.ɪˈtɪə.ri.əs/ us/ˌdel.ɪˈtɪr.i.əs/
有害的，造成危害的
harmful
These drugs have a proven deleterious effect on the nervous system. 已证实这些药物对神经系统有危害作用。
Synonyms: damagingdetrimental harmfulinjurious prejudicial
Opposites: harmlessinnocuous
Compare: hurtful