The distance inward, or depth, to which the excavation for a shaft or drift is to be carried, A natural or artificial means of absorbing or removing a substance or a form of energy from a system, A water basin fixed to a wall or floor and having a drainpipe and generally a piped supply of water, intransitive verb_ To invest or spend, often without getting a return or adequate value, To reduce in quantity or worth, To dig or drill (a mine or well) in the earth