The spelling of Ignatius bean can be explained using the International Phonetic Alphabet (IPA). The word starts with the sound /ɪ/ followed by the voiced velar stop /ɡ/. Then, the stressed syllable has the vowel sound /neɪ/, followed by the voiced alveolar nasal /n/. Finally, the word ends with the voiceless alveolar fricative /s/. Therefore, the correct spelling of this word that represents a type of bean is "I-gna-ti-us bean". With the IPA, one can accurately spell and pronounce complex and unique words.
Ignatia.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.