Lautverschiebung
enUKLaut´ver`schie`bung
(lout´fĕr`shē`bŎng)| n. | 1. | (Philol.) The regular changes which the primitive Indo-European stops, or mute consonants, underwent in the Teutonic languages, probably as early as the 3d century b. c. , often called the first Lautverschiebung, sound shifting, or consonant shifting. |