harmful

causing damage or injury to someone's health, feelings, etc.

perjudicial, dañino, peligroso

• a harmful effect/influence
• be harmful to somebody/something

Collocations harmful effects of pollution · harmful to health

• The report highlights the harmful effects of smoking.

  El informe destaca los efectos perjudiciales del tabaco.

causing physical or emotional pain or damage

nocivo, dañino, perjudicial

• be harmful to somebody/something

Collocations harmful effects on mental health · harmful words

• The news was very harmful to her morale.

  Las noticias fueron muy perjudiciales para su moral.