The correct answer is (D) To pay back (money previously spent); to repay; to compensate (someone) for expenditures made; to indemnify; to redress; to recompense; to remunerate; to recoup; to refund.

Reimburse comes from French embourser (to pocket money), Latin inbursare.

Examples of use:

• The company reimbursed him for his travel expenses.
• They were reimbursed for the damages sustained in the hurricane.