을 대고

to fund or supply something

→ 을
phrase Uncommon #10,123
to fund or supply something 을 is the object marker, and 대고 is the connective form of 대다. The precise meaning depends on the object: 돈을 대고 means to fund or pay for something, while 물건을 대고 means to supply goods.
KO: 누가 돈을 대고 있나요?
EN: Who is funding it?