decisive

/dษชหˆsaษชsษชv/
adjective
  1. 1

    Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.

    โ€œA decisive battle is fatal for one side's war chancesโ€

  2. 2

    Marked by promptness and decision.

    โ€œA noble instance of this attribute of the decisive character. -J. Foster.โ€

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