compound interest
noun /ˌkɒmpaʊnd ˈɪntrəst/, /ˌkɒmpaʊnd ˈɪntrest/
/ˌkɑːmpaʊnd ˈɪntrəst/, /ˌkɑːmpaʊnd ˈɪntrest/
[uncountable]- interest that is paid both on the original amount of money saved and on the interest that has been added to it compare simple interest