dredging
dredg-ing
verb
The act of bringing up forgotten or unpleasant facts, memories, or information.
"She was dredging up old arguments again."
noun
The process of clearing a waterway or searching for something underwater.
"The dredging of the harbour took many months."
verb
The act of removing mud, sand, or rubbish from a river or harbour bed.
"They are dredging the canal to improve navigation."