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 . and the term " law " is still used in referring to specific sound rules named after their authors, such as Grimm's Law, Grassmann's Law, etc ..
22.
:The endings mostly derive from the ancient Latin "-tatem " 3rd . declension accusative singular ending ( see Latin declension ) by regular neogrammarian sound laws ( the Italian form of the ending would appear to have been analogically reshaped to some degree, since it combines the segmental form of the nominative case with the stress-positioning of the oblique singular cases ).
