adverse

/ədˈvɜrs/
adjective
  1. Harmful, unfavorable, or working against someone or something.
    • The company faced adverse reactions from customers after the product recall.
    • Adverse weather conditions forced the cancellation of the outdoor concert.
    • The medicine had no adverse side effects for most patients.
What does "adverse" mean? | whatsthatwordmean | whatsthatwordmean