From Wiktionary, the free dictionary
Learned borrowing from Latin onus (literally “burden”).
Onus n (strong, genitive Onus, plural Onera)
- (dated, law) onus
- Synonym: Beweislast
Declension of Onus [neuter, strong]
- “Onus” in Duden online
- “Onus” in Digitales Wörterbuch der deutschen Sprache