Which term is not related to the study of phonetics?

Morphology refers to the study of the structure and formation of words, particularly the way in which morphemes combine to create meanings and nuances in language. While phonetics focuses specifically on the sounds of speech, including their production, transmission, and perception, morphology deals more with the units of meaning in a language.

On the other hand, phoneme, allograph, and morpheme are all interconnected with the study of phonetics. A phoneme is a basic unit of sound that can distinguish meaning between words, while an allograph represents different ways of writing the same phoneme (like different letters or letter combinations that make the same sound). A morpheme, the smallest grammatical unit in a language, often has phonetic aspects since how a morpheme is pronounced can influence phonetic analysis. Thus, morphology stands apart from phonetics, making it the term not related to the study of phonetics.