From Wiktionary, the free dictionary
Literally, “what little Jack doesn't learn, old Jack will learn nevermore”.
- IPA(key): /vas ˈhɛnsçən nɪçt ˈlɛʁnt lɛʁnt ˈhans ˈnɪmɐmeːɐ̯/, /... nɪmɐˈmeːɐ̯/
was Hänschen nicht lernt, lernt Hans nimmermehr
- you can't teach an old dog new tricks