一生 (いっしょう)whole life; a lifetime; all through life

whole life; a lifetime; all through lifenoun (common) (futsuumeishi), nouns which may take the genitive case particle 'no'
(the only, the greatest, etc.) of one's lifenouns which may take the genitive case particle 'no'

一生, its kanji, and other words that share them.Open this graph

Kanji in 一生

一つひとつone
一方いっぽうone (esp. of two); the other
一時いちじone o'clock
一月いちがつJanuary
一番いちばんnumber one; first
一般いっぱんgeneral; universal
一部いちぶone part; one portion
十一じゅういちeleven; 11
学生がくせいstudent (esp. a university student)
生活せいかつliving; life (one's daily existence)
生産せいさんproduction; manufacture
人生じんせい(human) life (i.e. conception to death)
先生せんせいteacher; instructor
厚生省こうせいしょうMinistry of Health and Welfare (now Ministry of Health, Labour and Welfare)
年生ねんせいpupil in ... year; student in ... year
新生しんせいrebirth; new birth

See how 一生 connects to the rest of Japanese.