How to pronounce costs:
To incur a charge of; to require payment of a (specified) price.
Example: "It will cost you a lot of money to take a trip around the world."
To cause something to be lost; to cause the expenditure or relinquishment of.
Example: "Trying to rescue the man from the burning building cost them their lives."
To require to be borne or suffered; to cause.
To calculate or estimate a price.
Example: "I'd cost the repair work at a few thousand."