cock·le 
/ˈkɑ:kəl/ noun
plural cock·les /ˈkɑ:kəl/ noun [count] : a type of shellfish with a shell that has two parts and is shaped like a heart
warm the cockles of your heart
◊If something warms the cockles of your heart, it makes you have warm and happy feelings.
▪ It is a story with a happy ending to warm the cockles of your heart.
▪ It is a story with a happy ending to warm the cockles of your heart.
