難於登天 Save Sign in to save words Simplified: 难于登天 nányúdēngtiān ㄋㄢˊ ㄩˊ ㄉㄥ ㄊㄧㄢ harder than climbing to heaven (idiom) Character by character 難(nán)difficult 於(yú)in 登(dēng)scale 天(tiān)day A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0