the world > movement > motion in a certain direction > downward motion > causing to come or go down > cause to come or go down [verb (transitive)] > plunge > into mud or a swamp (3)
transitive. literal. To plunge or set fast in mire or a mire. Usually in passive. Also with down.
transitive. To sink, submerge, or entangle, in a bog. Also figurative.
transitive. To plunge into or entangle in a swamp. Implied in enˈswamped adj.