元

also 本 · 素 · 基

1. noun, esp. 元 origin; source; beginning
2. oft. 基 basis; base; foundation; root
3. also written as 因, 原 cause
4. esp. 素 (raw) material; ingredient; base; mix (e.g. for a cake); (soup) stock
5. (one's) side
6. capital; principal; cost price
7. root (of a plant); (tree) trunk
8. part (of a brush, chopsticks, etc.) one holds (with the hand)
9. first three lines of a waka

also 旧 · 故

1. takes の, prefix former; ex-; past; one-time
2. noun, takes の earlier times; the past; previous state
3. noun, adverb formerly; previously; originally; before

げん

1. noun, mathematics unknown (e.g. in an equation)
2. mathematics element (of a set)
3. yuan (monetary unit of China)
4. (Taiwan) dollar
5. historical Yuan dynasty (of China; 1271-1368); Yüan dynasty; Mongol dynasty

ユアン

1. noun, usually in kana yuan (monetary unit of China)