Adh (trigraph)
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Trigraph (orthography) — A trigraph (from the Greek: τρεῖς, treîs, three and γράφω, gráphō, write ) is a group of three letters used to represent a single sound or a combination of sounds that does not correspond to the written letters combined. For example, in the word… … Wikipedia
Hexagraph — A hexagraph (from the Greek: ἕξ, héx, six and γράφω, gráphō, write ) is a sequence of six letters used to represent a single sound (phoneme), or a combination of sounds that do not correspond to the individual values of the letters. They are only … Wikipedia
Multigraph (orthography) — A multigraph is a sequence of letters that behaves as a unit and is not the sum of its parts, such as English ⟨ch⟩ or French ⟨eau⟩. The term is infrequently used, as the number of letters is usually specified: Digraph (two letters, as ⟨ch⟩ or… … Wikipedia
Irish orthography — has evolved over many centuries, since Old Irish was first written down in the Latin alphabet in about the sixth century AD. Prior to that, Primitive Irish was written in Ogham. Irish spelling is mainly based on etymological considerations, very… … Wikipedia
