Etymology
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injurious (adj.)

early 15c., "abusive," from Old French injurios "unjust; harmful" (14c., Modern French injurieux) and directly from Latin iniuriosus "unlawful, acting unjustly, wrongful, harmful," from iniuria "injustice, unlawful violence, insult" (see injury). Related: Injuriously; injuriousness.

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Definitions of injurious

injurious (adj.)
harmful to living things;
Synonyms: deleterious / hurtful
From wordnet.princeton.edu