expense

(noun) amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures). Synonyms: disbursal, disbursement.

(noun) a detriment or sacrifice. Example: "At the expense of."

(noun) money spent to perform work and usually reimbursed by an employer. Example: "He kept a careful record of his expenses at the meeting."

(verb) reduce the estimated value of something. Synonyms: write off, write down. Example: "For tax purposes you can write off the laser printer."