courteous behaviour
a courteous act or expression
Fair sir, you spit on me on Wednesday last, you spurned me such a day; another time you called me dog; and for these courtesies I'll lend you thus much moneys — Shakespeare
(used before a noun) done or provided by way of courtesy
a courtesy call
archaic a curtsy
by courtesy of/courtesy of
through the kindness, generosity, or permission granted by (a person or organization)
[Middle English corteisie from early French corteis courteous, from cort court1]