cursillo
Concise Oxford English Dictionary © 2008 Oxford University Press:
cursillo /kəːˈsiːjəʊ, -ˈsiːljəʊ/
▶noun (pl. cursillos) a short informal spiritual retreat by a group of Roman Catholics, especially in Spain or Latin America.
– origin 1950s: Sp., ‘little course’.
'cursillo' also found in these Oxford entries:

