先生【せんせい】
teacher, instructor, master, sensei, title or form of address for a teacher, master, doctor, lawyer, etc., intimate or teasing form of address, one's elder
先輩【せんぱい】
senior (at work or school), superior, elder, older graduate, progenitor, old-timer
先生【せんじょう】
teacher, instructor, master, previous existence
先生【シーサン】
man, boy
先週【せんしゅう】
last week, the week before
優先【ゆうせん】
preference, priority, precedence
先日【せんじつ】
the other day, a few days ago
この先【このさき】
beyond this point, ahead, from now on, after this, in the future
行き先【いきさき】
destination, whereabouts, future, prospects
先頭【せんとう】
head (of a line, group, etc.), front, lead, forefront, vanguard
先祖【せんぞ】
ancestor, forefather, foremother
連絡先【れんらくさき】
contact information (address, phone number, etc.)
お先に【おさきに】
before, previously, ahead, pardon me for leaving (before you)
先月【せんげつ】
last month
先ほど【さきほど】
a short while ago, a moment ago, just now, some time ago
先住民【せんじゅうみん】
indigenous people, native people, aborigines
最優先【さいゆうせん】
maximum preference, maximum priority, priority handling
校長先生【こうちょうせんせい】
school principal, school headmaster, school headmistress
先進国【せんしんこく】
advanced (developed) country, advanced nations
祖先【そせん】
ancestor