Metaphony

Sound change and alternation
Metathesis Quantitative metathesis
Lenition Consonant gradation Consonant voicing and devoicing Assibilation L-vocalization Debuccalization
Fortition
Epenthesis Anaptyxis Excrescence Prosthesis Paragoge Unpacking Vowel breaking
Elision Apheresis Syncope Apocope Haplology Fusion Cluster reduction
Cheshirization Compensatory lengthening Nasalization Tonogenesis Floating tone
Assimilation Coalescence Coarticulation Palatalization Velarization Labialization Final devoicing Metaphony (vowel harmony, umlaut) Consonant harmony
Dissimilation
Sandhi Liaison, linking R Consonant mutation Tone sandhi Hiatus Synalepha  Elision Crasis Synaeresis and diaeresis Synizesis
Other types Rhotacism Rhinoglottophilia Sulcalization
view

In historical linguistics, metaphony is a general term for a class of sound change in which one vowel in a word is influenced by another in a process of assimilation.

Progressive metaphony, in which a vowel early in the word influences a subsequent vowel, can be distinguished from regressive metaphony, in which a vowel towards the end of the word influences a preceding vowel. (Progressive metaphony is sometimes called "left-to-right" metaphony, and regressive metaphony may be called "right-to-left" metaphony.)

Progressive metaphony is also called vowel harmony, and is discussed fully in the article under that heading. However, some linguists use the term "vowel harmony" for regressive metaphony too.

Examples of regressive metaphony are i-mutation and a-mutation. (On i-mutation in Germanic languages see also Germanic umlaut.)

See also

• Apophony
• Metathesis
• Vowel harmony