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Sound change and alternation

Cheshirization, or cheshirisation, is a type of sound change where a trace remains of a sound that has otherwise disappeared from a word. The term was coined by James Matisoff and is a neologism, i.e. it is not an established scientific term. It is used here to refer to a process that is real but so far has no generally accepted name. The term rephonologization has sometimes been used to refer to this process; see below.

Essentially, a distinction between two sets of words that was formerly expressed through one phonological feature (e.g. a particular sound) is preserved (or partly preserved) through being re-expressed using a different phonological feature. This typically occurs through two sound changes: one that introduces a modification of some sort, conditioned on the presence or absence of a particular feature, followed by another change that deletes or changes the conditioning feature.

A common example is Germanic umlaut. In many Germanic languages around 500–700 AD, a sound change fronted a back vowel when an /i/ or /j/ followed in the next syllable. Typically, the /i/ or /j/ was then lost, leading to a situation where a trace of the original /i/ or /j/ remains in the fronted quality of the preceding vowel. Alternatively, a distinction formerly expressed through the presence or absence of an /i/ or /j/ suffix was then re-expressed as a distinction between a front or back vowel.

As a specific instance of this, in prehistoric Old English, a certain class of nouns was marked by an /i/ suffix in the (nominative) plural, but had no suffix in the (nominative) singular. A word like /muːs/ "mouse", for example, had a plural /muːsi/ "mice". After umlaut, the plural became pronounced [myːsi], where the long back vowel /uː/ was fronted, producing a new subphonemic front-rounded vowel [yː], which serves as a secondary indicator of plurality. Subsequent loss of final /i/, however, made /yː/ a phoneme and the primary indicator of plurality, leading to a distinction between /muːs/ "mouse" and /myːs/ "mice". In this case, the lost sound /i/ left a trace in the presence of /yː/; or equivalently, the distinction between singular and plural, formerly expressed through a suffix /i/, has been re-expressed using a different feature, namely the front-back distinction of the main vowel. This distinction survives in the modern forms "mouse" /maʊs/ and "mice" /maɪs/, although the specifics have been modified by the Great Vowel Shift.


Before disappearing, a sound may trigger or prevent some phonetic change in its vicinity that would not otherwise have occurred, and which may remain long afterward. For example:

  • In the English word night, the /x/ sound (spelled gh) disappeared, but before, or perhaps as it did so, it lengthened the vowel ⟨i⟩, so that the word is pronounced /ˈnt/ "nite" rather than the /ˈnɪt/ "nit" that would otherwise be expected for a closed syllable.
  • In French, a final /n/ sound disappeared, but left its trace in the nasalization of the preceding vowel, as in vin blanc [vɛ̃ blɑ̃], from historical [vim blaŋk].
  • In American English, the words rider and writer are pronounced with a [ɾ] instead of [t] and [d] as a result of flapping. The distinction between the two words is preserved by (or transferred to) the length of the vowel (or in this case, diphthong), as vowels are pronounced longer before voiced consonants than before voiceless consonants.

Other examples:


The term cheshirization refers to the Cheshire Cat, a character in the book Alice in Wonderland, who "vanished quite slowly, beginning with the end of the tail, and ending with the grin, which remained some time after the rest of it had gone. "

Other names

In a 1994 paper, Norman used the term rephonologization to refer to the same type of process, in the context of a proposed Old Chinese sound change that transferred a distinction formerly expressed through putative pharyngealization of the initial consonant of a syllable to one expressed through presence or absence of a palatal glide /j/ before the main vowel of the syllable.[1] Note that rephonologization is occasionally used with another meaning,[2] referring to changes such as the Germanic sound shift or the Slavic change from /ɡ/ to /ɦ/, where the phonological relationships among sounds change but the number of phonemes stays the same. This can be viewed as a special case of the broader process being described here.

See also


  1. Norman, Jerry (July–September 1994). "Pharyngealization in Early Chinese". Journal of the American Oriental Society. 114: 397–408. doi:10.2307/605083.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles> Specifically, the glide /j/ occurred whenever the initial consonant was not pharyngealized.
  2. Trask, R. L. (1995). A Dictionary of Phonetics and Phonology. Routledge. ISBN 978-0-415-11261-1.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>