tenderiser

/T EH0 N D EH1 R AY0 Z ER0/
noun
  1. 1

    Any substance added to meat before cooking in order to make it more tender, especially any source of the enzyme papain

  2. 2

    A form of mallet used to beat meat before cooking

Source: https://en.wiktionary.org/wiki/tenderiser, https://en.wiktionary.org/wiki/tenderizer