Assibilation
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| Historical sound change |
|---|
| General |
| Metathesis |
| Dissimilation |
| Fortition |
| Lenition (weakening) |
| Sonorization (voicing) |
| Spirantization (assibilation) |
| Rhotacism |
| Debuccalization (loss of place) |
| Elision (loss) |
| Apheresis (initial) |
| Syncope (medial) |
| Apocope (final) |
| Haplology (similar syllables) |
| Fusion |
| Cluster reduction |
| Compensatory lengthening |
| Epenthesis (addition) |
| Anaptyxis (vowel) |
| Excrescence (consonant) |
| Prosthesis (initial) |
| Paragoge (final) |
| Unpacking |
| Vowel breaking |
| Assimilation |
| Coarticulation |
| Palatalization (before front vowels) |
| Labialization (before rounded vowels) |
| Final devoicing (before silence) |
| Vowel harmony |
| Consonant harmony |
| Cheshirisation (trace remains) |
| Nasalization |
| Tonogenesis |
| Floating tone |
| Sandhi (boundary change) |
| Crasis (contraction) |
| Liaison, linking R |
| Consonant mutation |
| Tone sandhi |
| Hiatus |
In linguistics, assibilation is the term for a sound change resulting in a sibilant consonant. It is commonly the final phase of palatalization.
The word "assibilation" itself contains an example of the phenomenon, being pronounced /əsɪbɪleɪʃən/. The classical Latin tio was pronounced as /tio/ (for example, assibilatio was prounounced /asːibilatio/ and attentio /atːentio/). However, in Vulgar Latin it assibilated to /tsio/, and this can still be seen in Italic: attenzione. In French lenition gave /sjə/, which in English then palatalized to the /ʃə/.
For another example, in the history of Finnish, /ti/ changed to /si/. The alternation can be seen in dialectal and inflected word-forms: kielti vs. kielsi "s/he denied"; vesi "water", vetenä "as water".
Assibilation can also occur outside of palatalization. One example is the replacement of th with s or z characterizing a French accent of English.

