Tünche

Etymology
Probably inherited from (only attested as ), from, from. Alternatively the modern noun (15th c.) could be a new derivation from, itself derived from the Old High German noun. Either way a.

The form instead of  probably implies a borrowing around the time when the  ceased to be active and was applied with various irregularities (cf., which appears as ,  and ). Another possibility would be borrowing with initial d-. In fact the form occurs in Early Modern German, but tends to be interpreted as a later lenition.

Noun

 * 1) whitewash lime-based kind of white paint