There was hunger, there was poverty and the king couldn't care less about his people['s] well-being.

couldn't 是 can 的否定过去式，表示"不能"或"无法"。 care 是动词，意思是"关心、在意"。 less 是 little 的比较级，表示"更少"或"更不"。 couldn't care less 是一个固定短语，字面意思是"不能再更不关心"，表示"完全不在乎"或"毫不在意"。 people's 是名词 people 的所有格形式，表示"人们的"或"人民的"。