This rare verbal form depicts the physical act of trampling or treading down, likely formed by dissimilation from the more common root בּוּס. Amos employs this vivid image to indict the wealthy for their economic oppression of the poor. The trampling metaphor powerfully conveys the violent, dehumanizing nature of social injustice—treating people like dirt underfoot. The prophet links this trampling directly to economic exploitation and unjust taxation.