The word that is a SYNONYM for the word "generous" is "unselfish."
Here's why:
1. Generous: This word describes someone who is willing to give, share, or help others without expecting anything in return. It reflects a kind and giving nature.
2. Unselfish: This word also describes someone who puts the needs and happiness of others before their own. An unselfish person is considerate and caring towards others, similar to someone who is generous.
In the context of the sentence provided, both "generous" and "unselfish" convey a similar meaning in describing the neighbor's kind and giving nature. Therefore, "unselfish" is a synonym for "generous" in this case.