The spelling of the word "most ashcolored" can be explained with the use of IPA phonetic transcription. The word "ash" is pronounced as /æʃ/ and the suffix "-colored" is pronounced as /ˈkʌlərd/. The combining of these two pronunciations results in the word "ash-colored" which is pronounced as /ˈæʃˌkʌlərd/. Adding the superlative prefix "most" to the word gives us "most ashcolored" which is pronounced as /moʊst ˈæʃˌkʌlərd/. This word refers to something that is mostly or predominantly the color of ash.