Final answer:
When Odysseus plucked the cord, 'it smote the suitors and all their faces changed.' This suggests that the suitors had a significant emotional reaction. Based on the context, they were likely humiliated and enraged.
Step-by-step explanation:
The phrase 'it smote the suitors and all their faces changed' in the context of the Odyssey means that when Odysseus plucked the cord, it had a dramatic impact on the suitors. The suitors' faces changed, suggesting a significant emotional reaction. Based on the events leading up to this moment, it can be inferred that the suitors' faces changed because they were humiliated and enraged. Odysseus had just revealed his identity and demonstrated his strength by stringing and shooting an arrow through the axes, effectively proving his superiority over the suitors.