紙幣
しへい · shihei · JLPT N2 · noun
paper money
💵 紙幣 = 紙 (paper) + 幣 (money, currency) = paper money, notes, bills
紙 (shi) means paper and 幣 (hei) means currency or money. Joined, they name the paper bills you spend, as opposed to coins. Learn the two parts and the word follows.