お先に

おさきに

before, previously

我先に

われさきに

self first, striving to be first, scrambling for

矢先に

やさきに

just when one is...

先に立つ

さきにたつ

to lead, to take the initiative

真っ先に

at the very beginning; first of all; first and foremost; before anything else

先に通す

さきにとおす

to let (a person) pass first

後にも先にも

あとにもさきにも

before or since, neither before nor after, no other time in one's life, stressing a particular moment or event as being unique or most extreme

後先になる

あとさきになる

to be inverted (of the order of something); to be reversed; to get mixed up; to become back to front

先に進める

さきにすすめる

to proceed with; to continue with; to move on; to go forward; to pursue

お先にどうぞ

おさきにどうぞ

please go ahead; after you

後悔先に立たず

こうかいさきにたたず

It is no use crying over spilt milk

先頭に立つ

せんとうにたつ

to take the lead; to lead a group; to be in the vanguard

先生に就く

せんせいにつく

to study under (a teacher)

先例に倣う

せんれいにならう

to follow precedent

先先週

せんせんしゅう さきざきしゅう

week before last

先の先

せんのせん

striking just before one's opponent makes a move

先

さき せん

former, previous, old

先ず先ず

まずまず

tolerable, passable, adequate, so-so

行く先先

ゆくさきざき いくさきざき

everywhere, everywhere one goes, wherever one goes