札
さつ · satsu · JLPT N3 · noun
bill
💴🏷️ 札 = 木 wood + 乚 hook: a wooden tag that became a paper bill
Before paper, notes and labels were written on thin wooden slips, hence the 木 radical. 札 still means tag or label, as in 名札 (nafuda, name tag), and also banknote, as in 千円札 (sen'en-satsu, a 1,000-yen bill).
ふだ · fuda · JLPT N1 · noun
ticket