Final answer:
The unfamiliar word in the passage that might hurt the speaker's relationship with the audience is 'materializes'.
Step-by-step explanation:
In the passage, the word that might be unfamiliar to the audience and therefore hurt the speaker's relationship with them is materializes. This word means to come into being or to become actual or real. It is less commonly used and might require some explanation for the audience to understand its meaning.
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