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A hexagraph (from the (ギリシア語: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 found in the Irish orthography where many of them can be analysed as a tetragraph plus the vowels ''e'' or ''i'' on either side to indicate that the neighboring consonants are palatalized "slender". However, not all Irish hexagraphs are analyzable this way. The hexagraph ''oidhea,'' for example, represents the same sound (approximately the vowel in English "write") as the trigraph ''adh,'' and with the same effect on neighboring consonants. English does not have hexagraphs. The six-letter sequence ''schsch'' appears in German, for example in the name Eschscholz, but this is a doubling of the trigraph ''sch'' to indicate that the preceding vowel is short, rather than itself being a hexagraph. ==List of hexagraphs== ;Irish hexagraphs : ''Used between a palatalized ("slender") and a velarized ("broad") consonant:'' * and are both used to write the sound . Some words with the first: ''eidheann'' "ivy", ''feidheartha'' "penniless". And the second: ''leigheas'' "healing", ''deideigheanna'' "soft toys", ''deighealfaidh'' "will divide". ''Used between two slender consonants:'' * and are both used to write the sound , or in Donegal, . Some words with the first: ''breabhaid'' "sortie", ''deabhaidh'' "haste, skirmish", ''feabhais'' "improvement" (), ''leabhair'' "books", ''meabhair'' "minds". Words with the second: ''creamhaigh'' "garlic" (), ''sceamhaim'' "I bark", ''seamhain'' "semiology", ''sleamhain'' "slippery", ''teamhair'' "hill". * is used to write the sound , or in Donegal, . Some words with the hexagraph: ''feadhain'' "troop", ''Gairmleadhaigh'' "Gormley" (surname), ''ghleadhair'' "struck". ''Used between two broad consonants:'' * and are both used to write the sound . A word with the first is ''oidheanna'' "fates". Words with the second: ''Baoighealláin'' "Boylan" (surname), ''broigheall'' "cormorant", ''oigheann'' "oven", ''oighear'' "ice", ''poigheachán'' "(snail)shell". 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hexagraph」の詳細全文を読む スポンサード リンク
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