Knopern or Knoppern: How To spell?
The word Knopern is misspelled against Knoppern, a noun meaning "A kind of gall produced by a gallfly on the cup of an acorn, -- used in tanning and dyeing."
The word Knopern is misspelled against Knoppern, a noun meaning "A kind of gall produced by a gallfly on the cup of an acorn, -- used in tanning and dyeing."