the Slough of Despond
noun /ðə ˌslaʊ əv dɪˈspɒnd/
/ðə ˌslaʊ əv dɪˈspɑːnd/
[singular]- a mental state in which a person feels no hope and is very afraid
沮丧的泥沼：一种精神状态，一个人感到没有希望并且非常害怕 - He was sinking into the Slough of Despond.
他那时正陷入极度沮丧的状态。
词源From the name of a place that Christian, the main character, must travel through in John Bunyan’sThe Pilgrim’s Progress. - He was sinking into the Slough of Despond.