precursory

/P R IY0 K ER1 S ER0 IY0/
noun
  1. 1

    A precursor; a sign of the onset of something.

adjective
  1. 1

    Being or relating to a precursor; relating to events that will follow.

    โ€œprecursory symptoms of a feverโ€

Source: https://en.wiktionary.org/wiki/precursory