Injurious, a.
Etymology: [L. injuriousus, injurius; cf. F. injurieux. See Injury.]
1. Not just; wrongful; iniquitous; culpable. [Obs.] Milton. Till the injurious Roman did extort This tribute from us, we were free. Shak.
2. Causing injury or harm; hurtful; harmful; detrimental; mischievous; as, acts injurious to health, credit, reputation, property, etc. Without being injurious to the memory of our English Pindar. Dryden.
Syn. -- Harmful; hurtful; pernicious; mischievous; baneful; deleterious; noxious; ruinous; detrimental.
Shades of meaning
Fernald has no entry of its own for injurious; he lists it under pernicious.
Where he writes about it:
Pernicious is stronger than injurious; that which is injurious is capable of doing harm; that which is pernicious is likely to be destructive. — from pernicious
Noxious (L. noceo, hurt) is a stronger word than noisome, as referring to that which is injurious or destructive. — from pernicious