sound law
Noun
Meaning
a law describing sound changes in the history of a language
Source: WordNetSynonyms
sound change
phonetic rule
phonological process
phonological rule
phonetic change
phonetic law
phonological shift
phonological transformation
sound rule
phonetic principle
phonological change law
phonological change principle
sound change law
sound change principle
sound principle
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For these (and other) reasons, the term "sound law" has been criticized for implying a universality that is unrealistic with regard to sound change.
The Neogrammarian linguists of the 19th century introduced the term "sound law" to refer to rules of regular change, perhaps in imitation of the laws of physics.