The poem opens with fragments that read like the first shock of bad news: someone died this morning, someone broke, someone was unready. The speaker doesn't say who, or how these people connect, and that vagueness makes the loss feel raw and unprocessed. Nothing is explained, only listed.
In the second stanza the speaker paces, "above and below," as if searching for some place to stand while thinking it over. The odd twist is that the questions answer him. Instead of finding answers, he finds the questions talking back, which suggests a mind turning on itself.
The last stanza is harsher and stranger. "How lewdly they talk" could point to the questions, or to other people, and the belly as "a poor pit" suggests hunger, appetite, or the body's crude emptiness. The mood is restless, uneasy, and a little bitter. The title, "Adversarial," fits: grief here feels like an argument the speaker can't win.