The spelling of the word "Diagraphical" can be a bit confusing. It is spelled with the letters "di" followed by "agraphical". The "di" at the beginning actually represents the sound /dʒ/ (as in "jungle") and the "a" in "agra" is pronounced as /æ/ (as in "cat"). The rest of the word is fairly straightforward, with the emphasis on the second syllable. "Diagraphical" refers to something related to diagraphs, which are combinations of two letters that represent a single sound, like "sh" or "ch".
Diagraphical is an adjective that describes something related to or pertaining to diagraphs. A diagraph is a linguistic term that refers to a combination of two letters or characters used to represent a single speech sound. These paired letters or characters can be a combination of either vowels or consonants or a mixture of both. The purpose of using diagraphs is to represent sounds that are not easily represented by a single letter or character in a given written language.
The term diagraphical often denotes the study, analysis, or use of diagraphs within a specific linguistic context. It may refer to an examination of the patterns, rules, or conventions associated with the formation and usage of diagraphs within a particular language or writing system. This can include aspects such as the phonetic representation of diagraphs, their pronunciation, and their interpretation or transcription in various linguistic frameworks or orthographic systems.
Furthermore, diagraphical may also encompass the application or implementation of diagraphs in practical usage, such as in language teaching methods, computer programming, or the creation of written materials. It can be associated with the design and production of linguistic resources, educational materials, or software programs that leverage diagraphs to enhance language learning, facilitate text input or output, or enable efficient communication. The term diagraphical thus relates to the comprehensive understanding, examination, and utilization of diagraphs within linguistic and written contexts.
Descriptive.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.