to the marrow

Through and through; thoroughly; in every manner or respect. The fellow is stubborn to the marrow; he won't even listen to my plan the whole way through! Though he grew up in America, Henry is still British to the marrow.

to the marrow

You can use to the marrow to show how strong someone's feelings or beliefs are. Note: `Marrow' is the fatty substance inside the bones of a person or animal. He was a Democrat to the marrow. Note: Sometimes, people use the longer expression to the marrow of your bones. Some films chill you to the marrow of your bones.

to the marrow

to your innermost being.

Marrow is the soft, fatty substance found in the cavities of bones.

1994 Maurice Gee Crime Story Moral corruption, the lawyer said. Men who are greedy to the marrow of their bones.