The spelling of "irenicses" may seem perplexing at first glance, but it can be easily explained using IPA phonetic transcription. The word is made up of two components: "irenics" which means promoting peace, and "-es" which is a suffix indicating plurality. The pronunciation of "irenics" is /aɪrɛnɪks/ while "-es" is pronounced as /ɪz/. Thus, the correct spelling of the plural form of "irenics" is "irenicses" /aɪrɛnɪksɪz/. It may look like a difficult word to spell, but its pronunciation and spelling can be learned with practice.