The speaker implies that be being American, she has lost some of the traits (adjectives) that have followed her family - like one of her grandma's traits were 'lonesome for her other life' and the aunt was 'bitter'.
Explanation:
Since the author grew up being American, she didn't have the 'baggage' that other family members had and lost those traits.
The speaker of the poem Imply that being American is:
Being filled with opportunities and good traits. However, that being American and "smooth" some of these positive traits left her.
Explanation:
The key here is to analyze the final sentences, she said that those traits filled her in childhood as well as opportunity. Nevertheless, after she grew up she became American and some of them let her because by being American and smooth they found that they didn't belong here as a cause of being Americanly smooth.
