IPA: /ˈʌl.sər.əs/
KK: /ˈʌlsərəs/
Relating to or having sores on the body, often painful and inflamed.
The doctor diagnosed her with an ulcerous condition that required treatment.
Ulcerous → It is formed from "ulcus" (from Latin, meaning sore or ulcer) and the suffix "-ous" (meaning full of or having the quality of). The word "ulcerous" describes a condition characterized by the presence of sores or ulcers.
Think of 'ulcus' meaning sore, and remember that 'ulcerous' refers to something that is full of sores.