進退兩難 [ㄐㄧㄣˋ ㄊㄨㄟˋ ㄌㄧㄤˇ ㄋㄢˊ; jin4 tui4 liang3 nan2] no room to advance or to retreat (idiom); without any way out of a dilemma trapped in an impossible situation ◄ ►