igh is a sequence of letters that may be considered a trigraph for the diphthong IPA|/aɪ/ in English. It differs from the vowel letter "i" followed by the silent digraph "gh" in that the vowel is always "long": Compare "night" IPA|/naɪt/ with "nit" IPA|/nɪt/, for example.
Igh is also a trigraph used in Irish to write an unstressed IPA|/iː/ sound at the ends of words.
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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
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
