進退維谷 [ㄐㄧㄣˋ ㄊㄨㄟˋ ㄨㄟˊ ㄍㄨˇ; jin4 tui4 wei2 gu3] no room to advance or to retreat (idiom); without any way out of a dilemma trapped in an impossible situation ◄ ►