先
xiān
I adv.
1) before; earlier; in advance
2) for the time being; for the moment (with negative)
你先别走。 Don't leave yet.
II cons.
先 A zài B: first A and then B
III b.f.
1) elder generation (先辈)
2) ancestor (祖先)
3) late; deceased (先父)
4) progressive (先进)
IV pref.
pre-