sentences:  Before a labial consonant, /n/ can only appear in compounds, but in this case, it often shifts to the labial nasal consonant, that is, /m/, although generally only in compounds that are no longer clearly felt to be compounds.By monophthongization, the /u/ was preserved before nasal links such as /mb/ or /nb/, while /o/ arose before /a/ or /e/ in the following syllable.Placenames ending in "—bach" are a mark of the time of settlement expansion, as this ending was the popular one for new villages in the 8th to 11th centuries.