Pentagraph

Pentagraph

A pentagraph (from the Greek: πέντε, pénte, "five" and γράφω, gráphō, "write") is a sequence of five 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 pentagraph tzsch represents the [tʃ] sound of the English digraph ch. Irish has a number of pentagraphs. English, like most languages, has none.

List of pentagraphs

Irish

Used between a velarized ("broad") and a platalized ("slender") consonant:

To write the sound /əu̯/ (in Donegal, /oː/):

abhai⟩, ⟨amhai⟩, ⟨obhai⟩, ⟨odhai⟩, and ⟨oghai

To write the sound /əi̯/ (in Donegal, /eː/):

adhai⟩, ⟨aghai

To write the sound /əi̯/:

oidhi⟩ and ⟨oighi

To write the sound /oː/:

omhai

Used between a slender and a broad consonant:

To write the sound /əu̯/ (in Donegal, /oː/):

eabha⟩ and ⟨eamha

To write the sound /əi̯/ (in Donegal, /eː/):

eadha

Used between two slender consonants:

To write the sound /əi̯/: ⟨eidhi⟩ and ⟨eighi
German

tzsch⟩ was once used in German to write the sound /tʃ/. It has largely been replaced by the tetragraph ⟨tsch⟩, but is still found in proper names such as Nietzsche.

Cyrillic

In the Cyrillic alphabet used for languages of the Caucasus, there are a couple five-letter sequences used for 'strong' (typically transcribed in the IPA as geminate, and doubled in Cyrillic) labialized consonants. Since both features are predictable from the orthography, their pentagraph status is dubious.

The pentagraph ⟨ххьӀв⟩ is used in Archi for [χːˤʷ][1]: a labialized ⟨ххьI⟩ [χːˤ], which is the 'strong' counterpart of the pharyngealized voiceless uvular fricative ([χˤ]), written using the trigraph ⟨хьI⟩, whose graph is in turn an unpredictable derivation of ⟨х⟩ ([χ]) and thus a true trigraph.

See also

References


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