IPA: //ˈʌl.sə.reɪ.tɪv//
KK: /ˈʌlsərətɪv/
Relating to or causing the formation of ulcers, which are painful sores on the skin or mucous membranes.
The doctor diagnosed her with an ulcerative condition that required immediate treatment.
Ulcerative → It is formed from "ulcus" (from Latin, meaning sore or ulcer) and "-ative" (a suffix used to form adjectives indicating a tendency or quality). The word "ulcerative" describes a condition characterized by the presence of ulcers or sores.
Think of 'ulcus' meaning sore, and remember that 'ulcerative' refers to something that causes or is related to sores.