The spelling of the word "ignivomous" can be broken down using IPA phonetic transcription. The word can be pronounced as /ɪɡˈnɪvəməs/ or "ig-ni-vuh-muhss". The "ig" sound represents the "i" sound as in "sit", while "ni" is pronounced as "nee" and "vuh" as "vuh". The last syllable "muhss" rhymes with "fuss". "Ignivomous" is an uncommon word that means "spewing fire or flames" and is derived from the Latin words "ignis" (fire) and "vomere" (to vomit).
Vomiting fire.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.