The spelling of the word "ulcerable" is correct as it follows the pronunciation of the word. The IPA phonetic transcription for the word is ʌl-sər-ə-bəl. It consists of four syllables, with the first syllable pronounced as "uh-l" with the short "u" sound. The second syllable is pronounced as "suh" with the short "u" sound again. The third syllable is pronounced as "ruh" with the short "e" sound. The last syllable is pronounced as "buhl" with the short "u" sound. All syllables have equal stress.
The word "ulcerable" is derived from the base word "ulcer", which ultimately traces back to the Latin word "ulcus" meaning "sore" or "ulcer". The suffix "-able" is added to the base word to create the adjective form, indicating the capability or potential to form an ulcer.