(zǔ, ㄗㄨˇ) ancestor; forefather; grandparents; surname Zu [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]
却
(què, ㄑㄩㄝˋ) but; yet; however; while; to go back; to decline; to retreat; nevertheless [CE-DICT]
说
(shuì, ㄕㄨㄟˋ) persuade (politically) [CE-DICT]
(shuō, ㄕㄨㄛ) to speak; to say; a theory (usually in compounds such as 日心说 heliocentric theory) [CE-DICT]