All words begin with a root morpheme to which other morphemes are suffixed. Unlike consonant alternation, this occurs also within a morpheme. The English affricate phonemes and do not generally contain morpheme boundaries. Vowel groups can occur in the morpheme boundaries. The second is predictive gemination of initial consonants on morpheme boundaries. A character almost always corresponds to a single syllable that is also a morpheme. Accent will spread from an accented vowel to the following vowel across morpheme boundaries. The plural morpheme in English is suffixed to the end of most nouns. Most of the suffixes consist of a single morpheme. Neither exists as an independent morpheme except as a poetic abbreviation of the disyllabic word. Allomorphs are variants of a morpheme that differ in pronunciation but are semantically identical. In 1934, Arisaka Hideyo proposed a set of phonological restrictions permitted in a single morpheme. The morphophonology (the way the grammatical function of a morpheme affects its production) is complex. The form of the pronoun is dependent on that of the following morpheme. This word has a 1&colon;1 morpheme per word ratio.