noun
repercussion
ree-per-KUSH-un/ˌriːpərˈkʌʃn/
An indirect and often unwanted result of an action or event.
The spilled water is an unintended repercussion of knocking the first domino.

Etymology
A 'striking back' became a reverberation or echo. That returning-effect image then extended to consequences that follow an action, including unintended effects felt later.
In context
the outrage I feel towards you is a repercussion of your inaction
More examples
- One unexpected repercussion of the policy is a shortage of volunteers.
- She fears legal repercussions if she shares the confidential files.
- The scandal's political repercussions lasted for years.
Forms
repercussion · repercussions
Similar words
- consequence
- A broader term for results, whether direct, indirect, or welcome.
- fallout
- Emphasizes the collective harmful aftereffects of an event.
- ramification
- Emphasizes a branching consequence that adds complexity, not necessarily harm.