noxious

[ nok-shuhs ]
/ ˈnɒk ʃəs /

adjective

harmful or injurious to health or physical well-being: noxious fumes.
morally harmful; corrupting; pernicious: a noxious plan to spread dissension.

Origin of noxious

1605–15; < Latin noxius harmful, hurtful, injurious, equivalent to nox(a) harm, hurt, injury (akin to nocēre to do harm, inflict injury; see innocent) + -ius -ious

ANTONYMS FOR noxious

1, 2 harmless.

OTHER WORDS FROM noxious

nox·ious·ly, adverb nox·ious·ness, noun

Words nearby noxious

nowruz, nowt, nowty, nowy, nox, noxious, noyade, noyau, noyes, noyon, nozzle

British Dictionary definitions for noxiously

noxious
/ (ˈnɒkʃəs) /

adjective

poisonous or harmful
harmful to the mind or morals; corrupting

Derived forms of noxious

noxiously, adverb noxiousness, noun

Word Origin for noxious

C17: from Latin noxius harmful, from noxa injury

Medical definitions for noxiously

noxious
[ nŏk′shəs ]

adj.

Harmful to living things; injurious to health.