deleterious

Definitions

Causing harm or damage.

Harmful to living things or the environment.

Examples

The excessive use of pesticides has a deleterious effect on the local bee population.

Smoking is known to have deleterious consequences for your long-term cardiovascular health.

Synonyms

harmful damaging detrimental injurious pernicious destructive hurtful

Antonyms

beneficial harmless helpful advantageous salutary wholesome constructive