deleteriously
adverb
formaluk/ˌdel.ɪˈtɪə.ri.əs.li/us/ˌdel.ɪˈtɪr.i.əs.li/in aharmfulway:
Manypeoplehave been deleteriouslyaffectedbytheiractions.
Hiskidneyfailurehas notyetimpacteddeleteriously on othersystems.
See
deleterious
- Syntheticdetergentsareaffecteddeleteriously by thehardnessof thewater.
- Patients incountryareaswill be deleteriouslyaffectedby thislegislation.
- Acorporalat seventeen andcaptainat twenty-three, hisadvancementhad been deleteriouslyrapid.
Dangerous and harmful
- adverse
- adversely
- apocalyptic
- bad actor
- be murder onsomethingidiom
- detrimental
- devastating
- devastatingly
- do more harm than goodidiom
- forbidding
- kiss of deathidiom
- malicious
- murder
- negatively
- not dosomeoneany favoursidiom
- rogue state
- suicidally
- troublesome
- unholy
- unwholesome
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Serious and unpleasant