Final answer:
In the story, the word Chi refers to the Greek letter chi and represents the sound [k]. The word heir means someone who inherits or is entitled to receive something, typically in the context of property or a title.
Step-by-step explanation:
In the story, the word Chi refers to the Greek letter chi, which was pronounced as [k] and spelled as X. When Greek words containing chi were borrowed into English, the spelling changed to ch but the pronunciation remained as [k]. An example of this is the word Christmas. Therefore, the word Chi in the story represents the [k] sound.
The word heir means someone who inherits or is entitled to receive something, typically in the context of property or a title. In the story, it refers to someone who is in line to inherit something important, such as a position of power or a family legacy.