This word refers to the money paid by a person to use borrowed money. However, some modern versions interpret "any interest" in this passage as "too much interest."
Yahweh asks this as a leading question in order to emphasize the negative answer. Alternate translation: "he will certainly not live!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
Here the word "blood" represents death. For blood to be on a person is an idiom that means the person is responsible for that death. Alternate translation: "he will be responsible for his own death" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-idiom]])