2. Near-synonyms: dry rut of the perch, wailing.
3. Antonyms: desperation.
4, idiomatic source: "Zhuangzi - Foreign Objects": "Zhou came yesterday, there is the middle way and callers, Zhou Guzui look at the rut, there are perch."
5. Idiom usage: partial formal; as subject, object; a metaphor for people in distress.