|Writing system||Latin script|
|Type||Alphabetic and Logographic|
|Language of origin||Latin language|
|Time period||1847 to present|
|Other letters commonly used with||s(x), sh, š|
Esh (majuscule: Ʃ Unicode U+01A9, minuscule: ʃ Unicode U+0283) is a character used in conjunction with the Latin script, which represents the voiceless postalveolar fricative (English sh).
Its lowercase form ʃ is similar to a long s ſ or an integral sign ∫; in 1928 the Africa Alphabet borrowed the Greek letter sigma for the uppercase form Ʃ, but more recently the African reference alphabet discontinued it, using the lowercase esh only. The lowercase form was introduced by Isaac Pitman in his 1847 Phonotypic Alphabet to represent the voiceless postalveolar fricative (English sh). It is today used in the alphabets of some African languages, as well as in the International Phonetic Alphabet.
The International Phonetic Alphabet (IPA) uses U+0283 ʃ LATIN SMALL LETTER ESH to represent a voiceless palato-alveolar sibilant. Related obsolete IPA characters include U+01AA ƪ LATIN LETTER REVERSED ESH LOOP, U+0285 ʅ LATIN SMALL LETTER SQUAT REVERSED ESH, and U+0286 ʆ LATIN SMALL LETTER ESH WITH CURL.
U+AB4D ꭍ LATIN SMALL LETTER BASELINE ESH is used in the Teuthonista phonetic transcription system.
Variations of esh are used for other phonetic transcription: ᶋ ᶘ ʃ.