疑难问题
Traditional form:
疑難問題
Pinyin (reading):
yínánwèntí
Definitions:
- knotty problem
- intractable difficulty
Characters:
- 疑 - to doubt, to question, to suspect
- 难 - hard, difficult, arduous; unable
- 问 - to ask about, to inquire after
- 题 - forehead; headline, title; theme
Traditional characters: