ulcerating

/AH1 L S ER0 EY0 T IH0 NG/
verb
  1. 1

    To cause an ulcer to develop.

    โ€œThe surface was ulcerated by trauma.โ€

  2. 2

    To become ulcerous.

    โ€œThe tissue ulcerated shortly after exposure.โ€

Source: https://en.wiktionary.org/wiki/ulcerate, https://en.wiktionary.org/wiki/ulcerating