Answer:
In this excerpt from President John F. Kennedy’s inaugural address, the word “forebears” most likely means ancestors.
Step-by-step explanation:
In his Kennedy speech, he uses the word "forebears" referring to the ancestors, that is, the people who came before him and were equally important to the country.
In the speech, Kennedy says that before the people and before God he makes the same oath that the ancestors did for many years, with this he reinforces the importance and the historical weight that this discourse has.
He also says that many years have passed since this oath was first made, but the human being continues to debunk the revolutionary beliefs that the ancestors debated years ago.