Deleterious
/dˌɛləˈtɪriəs/
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Definition
(adj) Harmful, often in a subtle or unexpected way.
Sentence Examples
We cannot continue to ignore the deleterious effects of these policies on our country.
Insufficient illumination is deleterious to ocular health.
CEFR Practice Quiz
We cannot continue to ignore the ____ effects of these policies on our country.