Canalise
Part of speech: verb
Definition: To convert a river or other waterway into a canal. To channel the flow of something.
Canal
Part of speech: noun
Definition: A channel which connects one body of water to another, either for transport or for drainageA waterway used for transportation of vessels, especially a manmade one.A tubular channel within the body.
Example sentence: Actors do have good and bad sides. It's because the passage down the birth canal distorts the face. People born by caesarean section are more symmetrical.