Grimm's law

Etymology
Named for.

Proper noun

 * 1)  A sound change that affected the Proto-Indo-European stop consonants in the development of Proto-Germanic, causing devoicing or change into a fricative.
 * 2)  The description of this sound change (as originally formulated by Jacob Grimm), which establishes a set of regular correspondences between early Germanic stops and fricatives, and the consonants of Proto-Indo-European and most other Indo-European languages.

Translations

 * Dutch: eerste Germaanse klankverschuiving, wet van Grimm
 * French:
 * German:, Grimmsches Gesetz