See also: אויפן Yiddish Alternative forms אױפֿ׳ן (oyf'n) Pronunciation (YIVO) IPA(key): /ˈɔjfn̩/ (Northern Yiddish) IPA(key): /ˈafn̩/ (Southern Yiddish) IPA(key): /ˈɔfn̩/ Homophone: אופֿן (oyfn) (in YIVO standard) Preposition אויפֿן • (oyfn) (followed by masculine or neuter singular noun) Contraction of אויף דעם (oyf dem): on the/by the Descendants English: oof, oofless, ooftish, oofyWikiwand - on Seamless Wikipedia browsing. On steroids.