side effects

/S AY1 D IH0 F EH0 K T S/
noun
  1. 1

    An unintended consequence of any action in addition to the intended consequence of that action.

  2. 2

    An adverse effect, an unintended consequence of a drug or therapy; usually not a beneficial effect.

  3. 3

    A change in state caused by a function call (typically "side-effect").

    โ€œThe Eiffel programming language is somewhat purist in insisting that functions have no side effects.โ€

Synonyms

Source: https://en.wiktionary.org/wiki/side%20effect, https://en.wiktionary.org/wiki/side%20effects