The spelling of the word "most inpouring" can be explained using the IPA phonetic transcription. The word is pronounced as /moʊst ˈɪnpɔrɪŋ/ where the stress is on the first syllable "most". The word "inpouring" is spelled with the prefix "in-", meaning inside or into, and the verb "pour". The suffix "-ing" is added to the verb "pour" to create a present participle form. In this context, "most inpouring" implies the largest or most significant influx or flow of something, such as emotions or thoughts.