Tetragraph

A tetragraph, Template:Etymology, is a sequence of four letters used to represent a single sound (phoneme), or a combination of sounds, that do not necessarily correspond to the individual values of the letters. In German, for example, the tetragraph tsch represents the sound of the English digraph ch. English does not have tetragraphs in native words (the closest is perhaps the sequence -ough in words like through), but chth and phth are true tetragraphs when found initially in words of Greek origin such as chthonic and phthisis.

Phonemes spelled with multiple characters often indicate that either the phoneme or the script is alien to the language. For example, the Cyrillic alphabets adapted to the Caucasian languages, which are phonologically very different from Russian, make extensive use of digraphs, trigraphs, and even a tetragraph in Kabardian Template:Angbr for . The Romanized Popular Alphabet created for the Hmong languages includes three tetragraphs: nplh, ntsh, and ntxh, which represent complex consonants.

List of tetragraphs

Cyrillic script

In Cyrillic used for languages of the Caucasus, there are tetragraphs as doubled digraphs used for 'strong' consonants (typically transcribed in the IPA as geminate), and also labialized homologues of trigraphs.

Template:Angbr is used in Kabardian for , the labialized homologue of Template:Angbr , in turn unpredictably derived from ejective Template:Angbr .

Template:Angbr is used in Avar for , the 'strong' homologue of Template:Angbr , the ejective (Template:Angbr) homologue of Template:Angbr . It is often substituted with Template:Angbr .

Template:Angbr is used in Avar for . It is often substituted with Template:Angbr .

Template:Angbr is used in Avar for . It is often substituted with Template:Angbr .

Template:Angbr is used in Archi for

Template:Angbr is used in Archi for

Template:Angbr is used in Archi for

Template:Angbr is used in Archi for

Template:Angbr is used in Archi for

Template:Angbr is used in Archi for

Template:Angbr is used in Archi for

Canadian syllabics

Inuktitut syllabics has a series of trigraphs for ŋ followed by a vowel. For geminate ŋŋ, these are form tetragraphs with n:

ᙱ ŋŋi, ᙳ ŋŋu, ᙵ ŋŋa

These are literally nnggi, nnggu, nngga.

See also

• Digraph (orthography)
• Trigraph (orthography)
• Pentagraph
• Hexagraph
• Heptagraph
• Multigraph (orthography)
• List of Cyrillic letters
• Unigraph (orthography)