空巢
kōng​cháo

empty nest (human household)

空巢 kōng​cháo
empty nest (human household) noun
a home where the children have grown up and moved out, leaving the parents living alone

我想象不出比空巢更糟的事了。

wǒ xiǎng xiàng bù chū bǐ kōng​cháo gèng zāo de shì le.

I can't imagine anything worse than an empty nest.

empty nest (ornithology)
the period in a bird's nest between the young leaving and the next round of eggs being laid