Coffer :: Coffer (v. t.) To secure from leaking, as a shaft, by ramming clay behind the masonry or timbering..
Coffer :: Coffer (v. t.) To form with or in a coffer or coffers; to furnish with a coffer or coffers.
Cofferdam :: Cofferdam (n.) A water-tight inclosure, as of piles packed with clay, from which the water is pumped to expose the bottom (of a river, etc.) and permit the laying of foundations, building of piers, etc..
Cofferer :: Cofferer (n.) One who keeps treasures in a coffer.
Cofferwork :: Cofferwork (n.) Rubblework faced with stone.