(げん) (n) (1) {math} unknown (e.g. in an equation); (2) {math} element (of a set); (3) yuan (monetary unit of China); (4) Yuan dynasty (China) [EDICT]
(もと) (n) (1) (usu. 元) origin; source; (2) (esp. 基) base; basis; foundation; root; (3) (also 因, 原) cause; (4) (esp. 素) ingredient; material; (5) (元 only) (somebody's) side; (somebody's) location; (6) original cost (or capital, principal, etc.); (7) (plant) root; (tree) trunk; (8) (See 和歌) first section of a waka; (ctr) (9) (本 only) counter for blades of grass, tree trunks, etc., and for falcons (in falconry); (n) (10) handle (chopsticks, brush, etc.); grip; (P) [EDICT]
(もと) (n,adj-no,n-adv,n-pref) former; ex- [EDICT]
(yuán, ㄩㄢˊ) Chinese monetary unit; dollar; primary; first; the Yuan or Mongol dynasty (1279-1368); surname Yuan [CE-DICT]
先
(せん) (adj-no,n) (1) former; previous; old; (n) (2) first move (in go, shogi, etc.); opening move [EDICT]
(さき) (n,adj-no,n-suf,pref) (1) previous; prior; former; some time ago; preceding; (2) point (e.g. pencil); tip; end; nozzle; (3) head (of a line); front; (4) ahead; the other side; (5) the future; hereafter; (6) destination; (7) the other party; (P) [EDICT]
(xiān, ㄒㄧㄢ) early; prior; former; in advance; first [CE-DICT]