To reimburse is to pay someone back money they have spent or lost, usually for work or official reasons.
From Late Latin *reimbursare* (to repay), from *re-* (back) + *in bursa* (into the purse), with *bursa* meaning ‘purse, bag’. It literally means putting money back into someone’s purse.
When a company reimburses your travel costs, they’re literally refilling the ‘purse’ you emptied on their behalf. The word quietly reminds us that money is just moving between bags.
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