From Wiktionary, the free dictionary
See doppelt. Doublet of Zweifel.
Doppel n (strong, genitive Doppels, plural Doppel)
- (tennis) doubles
- duplicate
Declension of Doppel [neuter, strong]
- “Doppel” in Digitales Wörterbuch der deutschen Sprache
- “Doppel” in Duden online
- “Doppel” in Duden online