岌岌不可终日jí jí bù kě zhōng rì

in grave danger;in a critical condition; live in constant fear (/precariously)
❍ 同时，围城的炮声，天空中的飞机声，和说不出的恐慌，从四面八方压上来，使人们就在这铁打的墙壁里也感觉到～。(曹禺《明朗的天》 5) Meanwhile,the booming of the besieging artilery,the droning of aero planes in the sky and an indescribable sense of fear all merge into such a crushing weight upon the mind that,even though sheltered behind the high wall of the hospital,there is a feeling of panic.
❍ 若长此迁延，不特虚掷数百青年光阴，校务前途，亦～。(《鲁迅选集》Ⅱ—88) If we go on delaying like this,not only shall we be wasting the time of hundreds of young people,but endangering the future of this college.

岌岌不可终日jí jí bù kě zhōnɡ rì

比喻非常危急，一天也过不下去。live precariously, in grave danger, in a critical condition, live in constant fear