ulcerate

v. make ulcerous, become ulcerous, causing an open sore which discharges pus; creating a corrupt condition

Verb
1. undergo ulceration; "Her stomach ulcerated"
(hypernym) change
(derivation) ulceration
2. affect with an ulcer; "Her stomach was ulcerated"
(hypernym) affect
(derivation) ulcer, ulceration

v. canker, ulcerate

adj. ulcered

v. canker, cause decay

v. fester; ulcerate

(v. t.)
To affect with, or as with, an ulcer or ulcers.
  

(v. i.)
To be formed into an ulcer; to become ulcerous.