ulcerate

/AH0 L S ER0 EY1 T/
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€

adjective
  1. 1

    (of a pollen grain) Having an ulcus, a rounded pore-like aperture, at one or both poles.

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