How do you spell exedera?

"Exedera" is not a word in the English language. It's likely a misspelling.

Do you mean one of these words?

* Exedra: A semicircular or polygonal recess, typically with a vaulted roof, in a building or garden.

* Exeder: A misspelling of exedra.

* Exedra's: The possessive form of exedra.

Please provide more context, and I can help you find the correct spelling!