unanticipated consequences

noun phrase

Meaning

Outcomes or effects of an action that were not foreseen or intended at the time the action was taken.

Examples

  • The introduction of the invasive species had several unanticipated consequences for the local ecosystem.
  • Policymakers often struggle to predict the unanticipated consequences of sweeping economic reforms.

Synonyms: side effects, unintended outcomes, unforeseen results, ripple effects