ulcer
US /ˈʌl.sɚ/
UK /ˈʌl.sɚ/

1.
язва
an open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane that fails to heal
:
•
The doctor diagnosed him with a stomach ulcer.
Врач диагностировал у него язву желудка.
•
She had a painful mouth ulcer that made eating difficult.
У нее была болезненная язва во рту, из-за которой было трудно есть.