trigraph

English

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trigraph

Wikipedia

Etymology tree

Proto-Indo-European *tréyes

Proto-Indo-European *tri-

Proto-Italic *tri-

Latin tri-der.

English tri-

Proto-Indo-European *gerbʰ-

Proto-Hellenic *grə́pʰō

Ancient Greek γράφω (gráphō)

Ancient Greek -ος (-os)

Ancient Greek -γρᾰ́φος (-grắphos)der.

English -graph

English trigraph

From tri- + -graph.

Examples (spelling)
"dge” in bridge "tch" in catch "igh” or "ght" in right

trigraph (plural trigraphs)

(linguistics) A specific sequence of three letters, especially one used collectively to represent a single phoneme.
The letter “i” is pronounced as /aɪ/ when followed by the trigraph “ght”, as in right /raɪt/.
- 2023 June 12, Sarah Forst, “How to Teach Trigraphs DGE & TCH”, in The Designer Teacher‎^[1]:
  Then, practice reading fluency sentences together that contain words with trigraphs and other mastered words.
(computing) A three-character sequence used to enter a single conceptual character.
- 1993, Mark Andrews, Visual C++ Object-oriented Programming, page 186:
  These new features are charizing, stringization, token concatenation, string concatenation, trigraph replacement, and predefined macros.

sequence of three letters