imprest
Concise Oxford English Dictionary © 2008 Oxford University Press:
imprest/ˈɪmprɛst/
▶noun a fund used by a business for small items of expenditure and restored to a fixed amount periodically.
■ a sum of money advanced to a person for a particular purpose.
– origin C16: from the earlier phr. in prest ‘as a loan’, influenced by Ital. or med. L. imprestare ‘lend’.
'imprest' also found in these Oxford entries:

