metathesis
Soundchangeasaresultofsoundmovementisknownasmetathesis.Itinvolvesareversalinpositionoftwoneighboringsoundsegments.Forexample,the[r]soundinOldEnglishwords“bridd”and“hros”wasmovedtotherightofthevowelsoundsintheirModernEnglishcounterparts“bird”and“horse”.