The most accurate translation of "bột sắn dây" in English is arrowroot powder. While "arrowroot" can refer to the plant itself, "arrowroot powder" specifically refers to the starch extracted from the arrowroot plant's rhizomes, which is what "bột sắn dây" is.
However, it's important to note that there are different types of arrowroot, and the specific type used to make "bột sắn dây" is usually Maranta arundinacea. Therefore, for a more precise translation, you might use Chinese arrowroot powder or Maranta arundinacea powder, though these are less common terms. Using "arrowroot powder" in most contexts will be perfectly understandable.
