佶屈聱牙　

◎ 佶屈聱牙 jíqū-áoyá

[difficult to pronunce or comprehend;be full of difficult and unpronounceable words] 字晦澀難解,不通順暢達

佶屈聱牙的古書在青年實在不易理解,只徒糜費時日。——郭沫若《王陽明禮贊》