Unison is an adjective
According to the Merriam Webster dictionary unison means: At the same time, simultaneously.
Unison is used by Nathaniel Hawthorne in the story, “Young Goodman Brown,” on page 7. The narrator stated, Goodman Brown cried out, and his cry was lost to his own ear, by its unison with the cry of the desert.”
This means Goodman Brown cried out at the same time that the forest noises could be heard. These noises prevented him or anyone from hearing his cries.
