Birne

Etymology
From, , from , , from , reanalysis of the plural of. Early Modern German is from the Middle High German plural and dative/genitive singular, whence a double plural  was formed. The contemporary is a new backformation from this plural (perhaps influenced also by the older, still dialectal form ). Thus, between Latin and modern German, the word was reformed on the basis of the plural three times. Cognate with 🇨🇬.

Noun

 * 1) pear
 * 2) lightbulb
 * 3)  head, bonce, noggin