片语
Ingvaeonic nasal spirant lawIn historical linguistics, the Ingvaeonic nasal spirant law (also called the Anglo-Frisian or North Sea Germanic nasal spirant law) is a description of a phonological development that occurred in the Ingvaeonic dialects of the West Germanic language This includes Old English, Old Frisian, and Old Saxon, and to a small degree Old Dutch (Old Low Franconian).
medial labialized spirant中唇音化摩擦音
fricative摩擦音的;由摩擦产生的
fricative spirant擦音
blade spirant舌叶擦音
slit-spirant裂缝擦音