疑难 Traditional 疑難 yí nán 🔊 hard to understand + Keep this word Meanings yí nán 疑難 hard to understanddifficult to deal withknottycomplicated Its characters 疑yíto doubt; to suspect难nándifficult (to...)HSK 3 Words with 疑难 疑难杂症 yí nán zá zhèng dubious or hard-to-treat cases (medicine) 疑难问题 yí nán wèn tí knotty problem 疑难解答 yí nán jiě dá trouble shooting