寝食

qǐn shí jù wàng

寝食俱忘

forget about eating and sleeping

qǐn shí nán ān

寝食难安

have no peace of mind day and night

děng hòu cè shì jié guǒ de zhè liǎng gè xīng qī li wǒ qǐn shí bù ān

等候测试结果的这两个星期里我寝食不安。

I spent a tense two weeks waiting for the results of the tests.