Final answer:
The idiom 'Just say the word' is not explicitly found in the provided text excerpts, but it means to prompt someone to give a signal when they are ready for something to happen.
Step-by-step explanation:
The idiom "Just say the word" is a phrase that means to give a signal or command when one is ready for something to happen or for someone to do something. This phrase does not appear verbatim in the provided text excerpts. However, idiomatic expressions like this one are commonplace in the English language and are often used to convey a message in a figurative rather than literal manner.
Understanding idioms is important for mastering a language, and they are often encountered in various forms of communication, from literature to everyday speech. The phrase "Just say the word" could be likened to asking someone to give a cue or to signify that they are ready for assistance or for an action to commence.