未知数
wèizhīshùTraditional 未知數
uncertainty; unknown
Every meaning
wèizhīshù
- (math.) unknown quantity
- (fig.) uncertainty; unknown
Its characters
Words with 未
Words with 知
Meanings are from Mandarin The Wild’s own dictionary. Levels follow the official HSK word list (the exam’s 2025 syllabus, levels 7–9 shown together).