From Merriam Webster:

Cost (noun):

1.   

(a)  The amount or equivalent paid or charged for something (price); 

(b)  The outlay or expenditure (as of effort or sacrifice) made to achieve an object

2.  Loss or penalty incurred especially in gaining something

Cost (t. verb):

1.  To have a price of

2.  To cause to pay, suffer or lose something

3.  To estimate or set the cost of

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