困难在于 Traditional 困難在於 kùn nan zài yú 🔊 the problem is... + Keep this word Meanings kùn nan zài yú 困難在於 the problem is... Its characters 困kùnto trapHSK 4难nándifficult (to...)HSK 3在zàiat; in; to be (somewhere)HSK 1于yúin; at; onHSK 6