Answer:
The answer would be Proud happiness.
Explanation:
The poet Walt Whitman is writing a joyous poem stating as a country is singing, which means the country is in the joy and is proud on singing about the country.
Every single citizen seems to be proud and happy and so the word blithe can be con notated as Proud happiness.
He seemed to have a sense of pride and dignity towards working men while writing this poem as he portrayed every working individual singing during their work schedules.
This is one among the most iconic phrases
Pls mark me as brainliest.Thanks