ulcerating is ulcerate's Present Participle

ulcerate

US 
UK 
  • v.(使)生溃疡;(使)溃烂;(使)(道德)败坏
Past Participle:ulcerated  Present Participle:ulcerating  Simple Present:ulcerates  
v.
1.
(使)生溃疡;(使)溃烂;(使)(道德)败坏