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sound change
sound change Sound change is the historical alteration of the speech sounds that make up words as a language is passed from one generation to the next.
Sound change is the historical alteration of the speech sounds that make up words as a language is passed from one generation to the next. In historical phonology, it refers especially to the tendency for a change affecting a sound in one setting to spread through other words with the same sound under similar conditions, eventually producing broad regularity across the vocabulary.