deleteriousadjective
uk/ˌdel.ɪˈtɪə.ri.əs/us/ˌdel.ɪˈtɪr.i.əs/formalharmful:
These drugs have a proven deleterious effect on the nervous system.
Thesaurus: synonyms and related words
Dangerous and harmful
- adverse
- apocalyptic
- biohazard
- damaging
- destabilize
- favour
- forbidding
- gnarly
- harm
- harmful
- inimical
- kiss
- negative
- penal
- pernicious
- rogue
- ruinous
- self-destruct
- stinking thinking
- toxic
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Serious and unpleasant
deleteriously
adverb uk/ˌdel.ɪˈtɪə.ri.əs.li/us/ˌdel.ɪˈtɪr.i.əs.li/