s̈

{{short description|Latin letter S with diaeresis}}

{{More citations needed|date=February 2024}}

S̈, s̈ in lower case, also s with diaeresis, is a letter in the Latin alphabet for the Chechen language, where it represents the voiceless postalveolar fricative {{IPA|[ʃ]}}. It has the same sound as the š used in Slavic languages written with the Latin alphabet, the Turkic/Romanian ş/ș and the common digraph "sh".

In the Chechen language, it was changed from the original ş into s̈, at the same time that ç was changed into c̈.{{when|date=May 2022}}{{citation needed|date=January 2024}}

File:Luke 5 1, Bible kralická, vol 6. 1593.png, with Zacharyás̈ and Abiáſſowy, nowadays written Zacharyáš and Abiášovy in Czech.]]

In older Czech orthography s̈ was used in codas instead of ſſ for /ʃ/, modern orthography uses š for all instances.

In the Seneca language, s̈ represents /ʃ/.{{Cite web |title=Onödowága – Seneca |url=https://www.languagegeek.com/rotinonhsonni/seneca.html |access-date=2024-01-30 |website=www.languagegeek.com}}

It is also used in the digraph s̈h in the Shipibo language; s̈h represents /ʂ/, and sh (without the diaeresis) represents /ʃ/.