catalyst

/หˆkรฆt.ษ™l.ษชst/

IPA: /K AE1 T AH0 L AH0 S T/

noun
  1. 1

    A substance that increases the rate of a chemical reaction without being consumed in the process.

  2. 2

    Someone or something that encourages progress or change.

    โ€œEconomic development and integration are working as a catalyst for peace.โ€

  3. 3

    An inciting incident that sets the successive conflict into motion.

  4. 4

    A catalytic converter.

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