Definition of 「呺」:
1. 〔~然〕内中空虚的样子。
1. The state of being hollow inside.
2. 形容词 外大而中空、虚大。
2. Adjective: large externally but hollow and empty inside.
Example: 《集韵.平声.宵韵》:「呺,呺然,虚大貌。」(Jiyun, "Hao, haoran, the appearance of being empty and large.")
Example: 《庄子.逍遥游》:「非不呺然大也,吾为其无用而揞之。」(Zhuangzi, "It's not that it's not large and hollow; I regard it as useless and suppress it.")
3. 古通“号”,吼。
3. Historically interchangeable with "号" (hao), meaning to roar.
4. 动词 号叫、吼叫。
4. Verb: to call out, to roar.
Example: 《庄子.齐物论》:「是唯无作,作则万窍怒呺。」(Zhuangzi, "Only when there is no action does one provoke the furious roars from ten thousand vents.")