1. Able or likely to do harm.
2. Causing or capable of causing harm.

ETYM Latin injuriousus, injurius; cf. French injurieux. Related to Injury.
1. Not just; wrongful; iniquitous; culpable.
2. Causing injury or harm; hurtful; harmful; detrimental; mischievous.

ETYM Latin noxius, from noxa harm; akin to nocere to harm, hurt. Related to Nuisance, Necromancy.
Injurious to physical or mental health; SYN. harmful.
Harmful.

ETYM Latin praejudicialis belonging to a preceding judgment: cf. French préjudiciel.
1. Biased, possessed, or blinded by prejudices.
2. Tending to bias or prejudice.
3. Tending to obstruct or impair; hurtful; injurious; disadvantageous; detrimental.

ETYM Latin toxicum poison, originally, a poison in which arrows were dipped, Greek toxikon poison for smearing arrows with, from toxikos of or for the bow, from toxon bow, arrow. Related to Intoxicate.
Of or relating to or caused by a toxin or poison.
Poisoning; pertaining to or due to poison.