Part of speech:
Harmful to character or morality; corruptive:
Causing or able to cause harm; hurtful
Morally injurious; corrupting; unwholesome
Causing or tending to cause harm, especially to a legal case:
The definition of helpful is someone or something that is useful, that provides assistance or aid, or that is prone to providing aid.
Causing damage or harm; injurious.
(Slang) Extremely bad (bad enough to make one ill). Generally used indirectly with to be.
Inclined to annoy or vex with playful tricks; naughty
Causing harm or injury
Designed or tending to disprove or discredit:
Find another word for deleterious. In this page you can discover 22 synonyms, antonyms, idiomatic expressions, and related words for deleterious, like: injurious, pernicious, unhealthy, harmful, damaging, hurtful, noxious, prejudicial, ruining, helpful and aiding.