dredge

To clean out or deepen a river, harbour, or other body of water.

"They will dredge the canal next month."

To coat food lightly with a powdery substance like flour or sugar.

"Dredge the fish in seasoned flour."

An apparatus used to clear or collect from a body of water's bottom.

"The harbour dredge cleared the silt."

To bring up or retrieve something, often unpleasant, from the past.

"He tried to dredge up old memories."